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Sousa JPM, Deus IA, Monteiro CF, Custódio CA, Stratakis E, Mano JF, Marques PAAP. Comparative analysis of aligned and random amniotic membrane-derived cryogels for neural tissue repair. Biomater Sci 2024; 12:4393-4406. [PMID: 39034884 DOI: 10.1039/d4bm00364k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/23/2024]
Abstract
The ordered arrangement of cells and extracellular matrix facilitates the seamless transmission of electrical signals along axons in the spinal cord and peripheral nerves. Therefore, restoring tissue geometry is crucial for neural regeneration. This study presents a novel method using proteins derived from the human amniotic membrane, which is modified with photoresponsive groups, to produce cryogels with aligned porosity. Freeze-casting was used to produce cryogels with longitudinally aligned pores, while cryogels with randomly distributed porosity were used as the control. The cryogels exhibited remarkable injectability and shape-recovery properties, essential for minimally invasive applications. Different tendencies in proliferation and differentiation were evident between aligned and random cryogels, underscoring the significance of the scaffold's microstructure in directing the behaviour of neural stem cells (NSC). Remarkably, aligned cryogels facilitated extensive cellular infiltration and migration, contrasting with NSC cultured on isotropic cryogels, which predominantly remained on the scaffold's surface throughout the proliferation experiment. Significantly, the proliferation assay demonstrated that on day 7, the aligned cryogels contained eight times more cells compared to the random cryogels. Consistent with the proliferation experiments, NSC exhibited the ability to differentiate into neurons within the aligned scaffolds and extend neurites longitudinally. In addition, differentiation assays showed a four-fold increase in the expression of neural markers in the cross-sections of the aligned cryogels. Conversely, the random cryogels exhibited minimal presence of cell bodies and extensions. The presence of synaptic vesicles on the anisotropic cryogels indicates the formation of functional synaptic connections, emphasizing the importance of the scaffold's microstructure in guiding neuronal reconnection.
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Affiliation(s)
- Joana P M Sousa
- TEMA - Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193, Aveiro, Portugal.
- CICECO - Department of Chemistry, University of Aveiro, Campus Universitario de Santiago, Aveiro 3810-193, Portugal
| | - Inês A Deus
- CICECO - Department of Chemistry, University of Aveiro, Campus Universitario de Santiago, Aveiro 3810-193, Portugal
| | - Cátia F Monteiro
- CICECO - Department of Chemistry, University of Aveiro, Campus Universitario de Santiago, Aveiro 3810-193, Portugal
| | - Catarina A Custódio
- CICECO - Department of Chemistry, University of Aveiro, Campus Universitario de Santiago, Aveiro 3810-193, Portugal
- Metatissue, PCI Creative Science Park Aveiro Region, Via do Conhecimento, 3830-352 Ílhavo, Portugal
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (FORTH-IESL), Heraklion, Greece
| | - João F Mano
- CICECO - Department of Chemistry, University of Aveiro, Campus Universitario de Santiago, Aveiro 3810-193, Portugal
| | - Paula A A P Marques
- TEMA - Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193, Aveiro, Portugal.
- LASI - Intelligent Systems Associate Laboratory, Portugal
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Sun W, Ye B, Chen S, Zeng L, Lu H, Wan Y, Gao Q, Chen K, Qu Y, Wu B, Lv X, Guo X. Neuro-bone tissue engineering: emerging mechanisms, potential strategies, and current challenges. Bone Res 2023; 11:65. [PMID: 38123549 PMCID: PMC10733346 DOI: 10.1038/s41413-023-00302-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/08/2023] [Accepted: 10/31/2023] [Indexed: 12/23/2023] Open
Abstract
The skeleton is a highly innervated organ in which nerve fibers interact with various skeletal cells. Peripheral nerve endings release neurogenic factors and sense skeletal signals, which mediate bone metabolism and skeletal pain. In recent years, bone tissue engineering has increasingly focused on the effects of the nervous system on bone regeneration. Simultaneous regeneration of bone and nerves through the use of materials or by the enhancement of endogenous neurogenic repair signals has been proven to promote functional bone regeneration. Additionally, emerging information on the mechanisms of skeletal interoception and the central nervous system regulation of bone homeostasis provide an opportunity for advancing biomaterials. However, comprehensive reviews of this topic are lacking. Therefore, this review provides an overview of the relationship between nerves and bone regeneration, focusing on tissue engineering applications. We discuss novel regulatory mechanisms and explore innovative approaches based on nerve-bone interactions for bone regeneration. Finally, the challenges and future prospects of this field are briefly discussed.
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Affiliation(s)
- Wenzhe Sun
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Bing Ye
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Siyue Chen
- School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Lian Zeng
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Hongwei Lu
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Yizhou Wan
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Qing Gao
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Kaifang Chen
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Yanzhen Qu
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Bin Wu
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Xiao Lv
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China.
| | - Xiaodong Guo
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China.
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Jiang Z, Zhang W, Liu C, Xia L, Wang S, Wang Y, Shao K, Han B. Facilitation of Cell Cycle and Cellular Migration of Rat Schwann Cells by O-Carboxymethyl Chitosan to Support Peripheral Nerve Regeneration. Macromol Biosci 2023; 23:e2300025. [PMID: 37282815 DOI: 10.1002/mabi.202300025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 04/03/2023] [Indexed: 06/08/2023]
Abstract
O-carboxymethyl chitosan (CM-chitosan), holds high potential as a valuable biomaterial for nerve guidance conduits (NGCs). However, the lack of explicit bioactivity on neurocytes and poor duration that does not match nerve repair limit the restorative effects. Herein, CM-chitosan-based NGC is designed to induce the reconstruction of damaged peripheral nerves without addition of other activation factors. CM-chitosan possesses excellent performance in vitro for nerve tissue engineering, such as increasing the organization of filamentous actin and the expression of phospho-Akt, and facilitating the cell cycle and migration of Schwann cells. Moreover, CM-chitosan exhibits increased longevity upon cross-linking (C-CM-chitosan) with 1, 4-Butanediol diglycidyl ether, and C-CM-chitosan fibers possess appropriate biocompatibility. In order to imitate the structure of peripheral nerves, multichannel bioactive NGCs are prepared from lumen fillers of oriented C-CM-chitosan fibers and outer warp-knitted chitosan pipeline. Implantation of the C-CM-chitosan NGCs to rats with 10-mm defects of peripheral nerves effectively improve nerve function reconstruction by increasing the sciatic functional index, decreasing the latent periods of heat tingling, enhancing the gastrocnemius muscle, and promoting nerve axon recovery, showing regenerative efficacy similar to that of autograft. The results lay a theoretical foundation for improving the potential high-value applications of CM-chitosan-based bioactive materials in nerve tissue engineering.
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Affiliation(s)
- Zhiwen Jiang
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, P. R. China
| | - Wei Zhang
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, P. R. China
| | - Chenqi Liu
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, P. R. China
| | - Lixin Xia
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, P. R. China
| | - Shuo Wang
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, P. R. China
| | - Yanting Wang
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, P. R. China
| | - Kai Shao
- Department of Central Laboratory, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, 266035, P. R. China
| | - Baoqin Han
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, P. R. China
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Hsu MW, Chen SH, Tseng WL, Hung KS, Chung TC, Lin SC, Koo J, Hsueh YY. Physical processing for decellularized nerve xenograft in peripheral nerve regeneration. Front Bioeng Biotechnol 2023; 11:1217067. [PMID: 37324430 PMCID: PMC10267830 DOI: 10.3389/fbioe.2023.1217067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 05/23/2023] [Indexed: 06/17/2023] Open
Abstract
In severe or complex cases of peripheral nerve injuries, autologous nerve grafts are the gold standard yielding promising results, but limited availability and donor site morbidity are some of its disadvantages. Although biological or synthetic substitutes are commonly used, clinical outcomes are inconsistent. Biomimetic alternatives derived from allogenic or xenogenic sources offer an attractive off-the-shelf supply, and the key to successful peripheral nerve regeneration focuses on an effective decellularization process. In addition to chemical and enzymatic decellularization protocols, physical processes might offer identical efficiency. In this comprehensive minireview, we summarize recent advances in the physical methods for decellularized nerve xenograft, focusing on the effects of cellular debris clearance and stability of the native architecture of a xenograft. Furthermore, we compare and summarize the advantages and disadvantages, indicating the future challenges and opportunities in developing multidisciplinary processes for decellularized nerve xenograft.
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Affiliation(s)
- Ming-Wei Hsu
- Division of Plastic and Reconstructive Surgery, Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Szu-Han Chen
- Division of Plastic and Reconstructive Surgery, Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Center of Cell Therapy, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- International Research Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan
| | - Wan-Ling Tseng
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Tainan Hospital, Ministry of Health and Welfare, Tainan, Taiwan
| | - Kuo-Shu Hung
- Division of Plastic and Reconstructive Surgery, Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Tzu-Chun Chung
- Department of Orthopedic Surgery, E-Da Hospital, Kaohsiung, Taiwan
| | - Sheng-Che Lin
- Division of Plastic Surgery, Department of Surgery, An-Nan Hospital, China Medical University, Tainan, Taiwan
| | - Jahyun Koo
- School of Biomedical Engineering, Korea University, Seoul, Republic of Korea
| | - Yuan-Yu Hsueh
- Division of Plastic and Reconstructive Surgery, Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Center of Cell Therapy, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- International Research Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan
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Zhang Z, Lv Y, Harati J, Song J, Du P, Ou P, Liang J, Wang H, Wang PY. Submicron-Grooved Films Modulate the Directional Alignment and Biological Function of Schwann Cells. J Funct Biomater 2023; 14:jfb14050238. [PMID: 37233348 DOI: 10.3390/jfb14050238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/12/2023] [Accepted: 04/21/2023] [Indexed: 05/27/2023] Open
Abstract
Topographical cues on material surfaces are crucial for guiding the behavior of nerve cells and facilitating the repair of peripheral nerve defects. Previously, micron-grooved surfaces have shown great potential in controlling nerve cell alignment for studying the behavior and functions of those cells and peripheral nerve regeneration. However, the effects of smaller-sized topographical cues, such as those in the submicron- and nano-scales, on Schwann cell behavior remain poorly understood. In this study, four different submicron-grooved polystyrene films (800/400, 800/100, 400/400, and 400/100) were fabricated to study the behavior, gene expression, and membrane potential of Schwann cells. The results showed that all submicron-grooved films could guide the cell alignment and cytoskeleton in a groove depth-dependent manner. Cell proliferation and cell cycle assays revealed that there was no significant difference between the submicron groove samples and the flat control. However, the submicron grooves can direct the migration of cells and upregulate the expression of critical genes in axon regeneration and myelination (e.g., MBP and Smad6). Finally, the membrane potential of the Schwann cells was significantly altered on the grooved sample. In conclusion, this study sheds light on the role of submicron-grooved patterns in regulating the behavior and function of Schwann cells, which provides unique insights for the development of implants for peripheral nerve regeneration.
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Affiliation(s)
- Zhen Zhang
- Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuanliang Lv
- Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Javad Harati
- Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jianan Song
- Oujiang Laboratory, Key Laboratory of Alzheimer's Disease of Zhejiang Province, Institute of Aging, Wenzhou Medical University, Wenzhou 325000, China
| | - Ping Du
- Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Peiyan Ou
- Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiaqi Liang
- Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Huaiyu Wang
- Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Peng-Yuan Wang
- Oujiang Laboratory, Key Laboratory of Alzheimer's Disease of Zhejiang Province, Institute of Aging, Wenzhou Medical University, Wenzhou 325000, China
- Shenzhen Key Laboratory of Biomimetic Materials and Cellular Immunomodulation, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
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Zhou G, Chen Y, Dai F, Yu X. Chitosan-based nerve guidance conduit with microchannels and nanofibers promotes schwann cells migration and neurite growth. Colloids Surf B Biointerfaces 2023; 221:112929. [DOI: 10.1016/j.colsurfb.2022.112929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 09/27/2022] [Accepted: 10/11/2022] [Indexed: 11/06/2022]
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Nerve Regeneration Effect of a Composite Bioactive Carboxymethyl Chitosan-Based Nerve Conduit with a Radial Texture. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27249039. [PMID: 36558171 PMCID: PMC9783930 DOI: 10.3390/molecules27249039] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/13/2022] [Accepted: 12/15/2022] [Indexed: 12/23/2022]
Abstract
Chitosan (CTS) has been used as a nerve guidance conduit (NGC) material for bridging peripheral nerve defects due to its biocompatible, biodegradable, and non-toxic properties. However, the nerve regeneration effect of chitosan alone is restricted due to its inadequate biological activity. Herein, a composite, bioactive chitosan based nerve conduit, consisting of outer warp-knitted tube scaffold made from medical-grade chitosan fiber, and inner porous cross linked carboxymethyl chitosan (C-CM-CTS) sponge with radial texture was developed. The inner wall of the scaffold was coated with C-CM-CTS solution. CM-CTS provided favorable bioactivities in the composite chitosan-based nerve conduit. An in vitro study of CM-CTS revealed its satisfying biocompatibility with fibroblast and its inhibition of oxidative damage to Schwann cells. As the internal filler of the NGC, the lyophilized sponge of C-CM-CTS showed a longitudinal guidance effect for nerve reconstruction. After 10 mm defect in rat sciatic nerve was bridged with the composite bioactive chitosan-based nerve conduit, the nerve conduit was able to effectively promote axonal regeneration and played a positive role in inducing nerve regeneration and functional recovery. In addition to the functional advantages, which are equal to those of an autograft; the technology for the preparation of this conduit can be put into mass production.
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Multichannel nerve conduit based on chitosan derivates for peripheral nerve regeneration and Schwann cell survival. Carbohydr Polym 2022; 301:120327. [DOI: 10.1016/j.carbpol.2022.120327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 11/05/2022] [Accepted: 11/07/2022] [Indexed: 11/13/2022]
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Zeng Z, Yang Y, Deng J, Saif Ur Rahman M, Sun C, Xu S. Physical Stimulation Combined with Biomaterials Promotes Peripheral Nerve Injury Repair. Bioengineering (Basel) 2022; 9:292. [PMID: 35877343 PMCID: PMC9311987 DOI: 10.3390/bioengineering9070292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 06/11/2022] [Accepted: 06/13/2022] [Indexed: 11/17/2022] Open
Abstract
Peripheral nerve injury (PNI) is a clinical problem with high morbidity that can cause severe damage. Surgical suturing or implants are usually required due to the slow speed and numerous factors affecting repair after PNI. An autologous nerve graft is the gold standard for PNI repair among implants. However, there is a potential problem of the functional loss of the donor site. Therefore, tissue-engineered nerve biomaterials are often used to bridge the gap between nerve defects, but the therapeutic effect is insufficient. In order to enhance the repair effect of nerve biomaterials for PNI, researchers are seeking to combine various stimulation elements, such as the addition of biological factors such as nerve growth factors or physical factors such as internal microstructural modifications of catheters and their combined application with physical stimulation therapy. Physical stimulation therapy is safer, is more convenient, and has more practical features than other additive factors. Its feasibility and convenience, when combined with nerve biomaterials, provide broader application prospects for PNI repair, and has therefore become a research hot spot. This paper will review the combined application of physical stimulation and biomaterials in PNI repair in recent years to provide new therapeutic ideas for the future use of physical stimulation in PNI repair.
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Affiliation(s)
- Zhipeng Zeng
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; (Z.Z.); (M.S.U.R.)
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
- School of Sport Medicine and Rehabilitation, Beijing Sport University, Beijing 100084, China
| | - Yajing Yang
- National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital and Shenzhen Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Shenzhen 518116, China;
| | - Junyong Deng
- Department of Rehabilitation, Second Affiliated Hospital of Nanchang University, Nanchang 330006, China;
| | - Muhammad Saif Ur Rahman
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; (Z.Z.); (M.S.U.R.)
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Chengmei Sun
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; (Z.Z.); (M.S.U.R.)
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Shanshan Xu
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; (Z.Z.); (M.S.U.R.)
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
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Metformin Promotes Axonal Regeneration and Functional Recovery in Diabetic Rat Model of Sciatic Nerve Transection Injury. NEUROSCI 2022. [DOI: 10.3390/neurosci3030026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In our previous study, metformin was able to promote nerve regeneration after sciatic nerve crushing in rats under diabetic conditions. However, a crush injury also has a strong ability to spontaneously recover. Therefore, in our present study, a model of transection injury of the sciatic nerve in diabetic rats was utilized to detect whether metformin could still promote nerve regeneration. Diabetes was induced via an injection of 50 mg/kg of streptozotocin in rats. After transection injury of the sciatic nerve, the rats were randomly divided into a high-dose metformin group (500 mg/kg/d), mid-dose metformin group (200 mg/kg/d), low-dose metformin group (30 mg/kg/d) and control group (normal saline). The metformin or normal saline was intraperitoneally injected for 4 weeks. Then, behavioral, electrophysiological and morphometric analyses were performed. The results showed that metformin could significantly promote functional restoration and axonal regeneration of the sciatic nerve after transection injury under diabetic conditions. Furthermore, high doses and middle doses of metformin presented more of this ability than a low dose of metformin. In conclusion, metformin is able to accelerate sciatic nerve repair after transection injury under diabetic conditions, showing the therapeutic potential of metformin in the management of nerve injuries during diabetes mellitus.
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Li H, Yu K, Zhang P, Ye Y, Shu Q. A printability study of multichannel nerve guidance conduits using projection-based three-dimensional printing. J Biomater Appl 2022; 37:538-550. [PMID: 35549934 DOI: 10.1177/08853282221101148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Multichannel nerve guidance conduits (NGCs) replicating the native architecture of peripheral nerves have emerged as promising alternatives to autologous nerve grafts. However, manufacturing multichannel NGCs is challenging in terms of desired structural stability and resolution. In this study, we systematically investigated the effects of photopolymer properties, inner diameter dimensions, printing parameters, and different conditions on multichannel NGCs printability using projection-based three-dimensional printing. Low viscosity and rapid photocuring properties were essential requirements. A standard model was generated to evaluate multichannel NGC printed quality. The results showed that printing deviations decreased with increased mechanical strength and inner diameter. Subsequently, gelatin methacrylate (GelMA) NGCs was selected as a representative. It was found that printing conditions, including printing temperature, peeling, and shrinkage affected final NGC accuracy and quality. PC-12 cells cultured with the GelMA NGCs displayed non-toxic and promoted cell migration. Our research provides an effective, time-saving, and high-resolution technology for manufacturing multichannel NGCs with high fidelity, which may be used as reference templates for biomedical applications.
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Affiliation(s)
- Haibing Li
- Department of Paediatric Orthopaedics, The Children's Hospital, 605254Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
| | - Kang Yu
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, 529107Zhejiang University, Hangzhou, China
| | - Peng Zhang
- Engineering for Life Group (EFL), 529107Zhejiang University School of Mechanical Engineering, China
| | - Yensong Ye
- Department of Paediatric Orthopaedics, The Children's Hospital, 605254Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
| | - Qiang Shu
- Department of Paediatric Orthopaedics, The Children's Hospital, 605254Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
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Sanchez Rezza A, Kulahci Y, Gorantla VS, Zor F, Drzeniek NM. Implantable Biomaterials for Peripheral Nerve Regeneration-Technology Trends and Translational Tribulations. Front Bioeng Biotechnol 2022; 10:863969. [PMID: 35573254 PMCID: PMC9092979 DOI: 10.3389/fbioe.2022.863969] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 04/05/2022] [Indexed: 02/01/2023] Open
Abstract
The use of autografted nerve in surgical repair of peripheral nerve injuries (PNI) is severely limited due to donor site morbidity and restricted tissue availability. As an alternative, synthetic nerve guidance channels (NGCs) are available on the market for surgical nerve repair, but they fail to promote nerve regeneration across larger critical gap nerve injuries. Therefore, such injuries remain unaddressed, result in poor healing outcomes and are a limiting factor in limb reconstruction and transplantation. On the other hand, a myriad of advanced biomaterial strategies to address critical nerve injuries are proposed in preclinical literature but only few of those have found their way into clinical practice. The design of synthetic nerve grafts should follow rational criteria and make use of a combination of bioinstructive cues to actively promote nerve regeneration. To identify the most promising NGC designs for translation into applicable products, thorough mode of action studies, standardized readouts and validation in large animals are needed. We identify design criteria for NGC fabrication according to the current state of research, give a broad overview of bioactive and functionalized biomaterials and highlight emerging composite implant strategies using therapeutic cells, soluble factors, structural features and intrinsically conductive substrates. Finally, we discuss translational progress in bioartificial conduits for nerve repair from the surgeon's perspective and give an outlook toward future challenges in the field.
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Affiliation(s)
- Angela Sanchez Rezza
- Charité— Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt–Universität zu Berlin, Institute of Medical Immunology, Berlin, Germany
| | - Yalcin Kulahci
- Wake Forest School of Medicine, Department of Surgery, Wake Forest Institute for Regenerative Medicine, Winston-Salem, NC, United States
| | - Vijay S. Gorantla
- Wake Forest School of Medicine, Department of Surgery, Wake Forest Institute for Regenerative Medicine, Winston-Salem, NC, United States
| | - Fatih Zor
- Wake Forest School of Medicine, Department of Surgery, Wake Forest Institute for Regenerative Medicine, Winston-Salem, NC, United States
| | - Norman M. Drzeniek
- Charité— Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt–Universität zu Berlin, Institute of Medical Immunology, Berlin, Germany
- Berlin Institute of Health at Charité—Universitätsmedizin Berlin, BIH Center for Regenerative Therapies (BCRT), Berlin, Germany
- Charité — Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt- Universität zu Berlin, Berlin-Brandenburg School for Regenerative Therapies (BSRT), Berlin, Germany
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Liu Z, Liu Y, Yushan M, Yusufu A. Enhanced Nerve Regeneration by Bionic Conductive Nerve Scaffold Under Electrical Stimulation. Front Neurosci 2022; 16:810676. [PMID: 35573307 PMCID: PMC9091912 DOI: 10.3389/fnins.2022.810676] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Accepted: 02/14/2022] [Indexed: 11/15/2022] Open
Abstract
Repair of peripheral nerve defect (PND) with a poor prognosis is hard to deal with. Neural conduit applied to nerve defect at present could not achieve the effect of autologous nerve transplantation. We prepared bionic conductive neural scaffolds to provide a new strategy for the treatment of PNDs. The highly aligned poly (L-lactic acid) (PLLA) fiber mats and the multi-microchannel conductive scaffolds were combined into bionic conductive nerve scaffolds, which were implanted into rats with sciatic nerve defects. The experimental animals were divided into the scaffold group (S), scaffold with electrical stimulation (ES) group (S&E), and autologous nerve transplantation group (AT). The regenerative effect of bionic conductive nerve scaffolds was analyzed. Compared with aligned PLLA fiber mats (APFMs), highly aligned fiber mats had a higher fiber orientation and did not change the tensile strength, Young’s modulus, degradation rate, elongation at break of the fiber membrane, and biocompatibility. The bionic conductive nerve scaffolds were well matched with the rat sciatic nerve. The evaluations of the sciatic nerve in Group S&E were close to those in Group AT and better than those in Group S. Immunohistochemical results showed that the expression levels of neurofilament heavy polypeptide (NF-H) and protein S100-B (S100-β) in Group S&E were higher than those in Group S, and the expression levels of low-density lipoprotein receptor-related protein 4 (LRP4), mitogen-activated protein kinase (MAPK) p38, extracellular signal-regulated kinase (ERK), and mitogen-activated protein kinase kinase (MEK) in Group AT were higher than those in Group S. Bionic conductive nerve scaffolds combined with ES could enhance peripheral nerve regeneration and achieve satisfactory nerve regeneration close to autologous nerve grafts. ERK, p38 MAPK, MEK, and LRP4 may be involved in peripheral nerve regeneration under ES.
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Affiliation(s)
- Zhenhui Liu
- Department of Orthopedics, Henan Provincial People’s Hospital, Zhengzhou, China
- People’s Hospital of Zhengzhou University, Zhengzhou, China
- People’s Hospital of Henan University, Zhengzhou, China
- Department of Trauma and Micro Reconstructive Surgery, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Yanshi Liu
- Department of Trauma and Micro Reconstructive Surgery, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Maimaiaili Yushan
- Department of Trauma and Micro Reconstructive Surgery, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Aihemaitijiang Yusufu
- Department of Trauma and Micro Reconstructive Surgery, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
- *Correspondence: Aihemaitijiang Yusufu,
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14
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Mu X, Sun X, Yang S, Pan S, Sun J, Niu Y, He L, Wang X. Chitosan Tubes Prefilled with Aligned Fibrin Nanofiber Hydrogel Enhance Facial Nerve Regeneration in Rabbits. ACS OMEGA 2021; 6:26293-26301. [PMID: 34660988 PMCID: PMC8515574 DOI: 10.1021/acsomega.1c03245] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 09/21/2021] [Indexed: 05/08/2023]
Abstract
Facial nerves are fragile and easily injured, for example, by traffic accidents or operations. Facial nerve injury drastically reduces the quality of life in affected patients, and its treatment presents clinical challenges. A promising therapeutic strategy includes nerve conduits with appropriate fillers capable of guiding nerve regeneration. In this study, a three-dimensional hierarchically aligned fibrin nanofiber hydrogel (AFG) assembled via electrospinning and molecular self-assembly was first used to mimic the architecture of the native fibrin cable, which is similar to the nerve extracellular matrix (ECM). AFG as a substrate in chitosan tubes (CST) was used to bridge a 7 mm-long gap in a rabbit buccal branch facial nerve defect model. The results showed that AFG and CST showed good compatibility to support the adhesion, activity, and proliferation of Schwann cells (SCs). Further morphological, histological, and functional analyses demonstrated that the regenerative outcome of AFG-prefilled CST was close to that of autologous nerve grafts and superior to that of CST alone or CSTs prefilled with random fibrin nanofiber hydrogel (RFG), which indicated that AFG-prefilled CST markedly improved axonal regeneration with enhanced remyelination and functional recovery, thus showing great potential for clinical application for facial nerve regeneration treatments.
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Affiliation(s)
- Xiaodan Mu
- The
First Affiliated Hospital and School of Stomatology, Harbin Medical University, Harbin, Heilongjiang 150001, China
| | - Xiangyu Sun
- The
First Affiliated Hospital and School of Stomatology, Harbin Medical University, Harbin, Heilongjiang 150001, China
| | - Shuhui Yang
- Department
of Materials Science and Engineering, State Key Laboratory of New
Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China
| | - Shuang Pan
- The
First Affiliated Hospital and School of Stomatology, Harbin Medical University, Harbin, Heilongjiang 150001, China
| | - Jingxuan Sun
- The
First Affiliated Hospital and School of Stomatology, Harbin Medical University, Harbin, Heilongjiang 150001, China
| | - Yumei Niu
- The
First Affiliated Hospital and School of Stomatology, Harbin Medical University, Harbin, Heilongjiang 150001, China
| | - Lina He
- The
First Affiliated Hospital and School of Stomatology, Harbin Medical University, Harbin, Heilongjiang 150001, China
| | - Xiumei Wang
- Department
of Materials Science and Engineering, State Key Laboratory of New
Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China
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15
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Ma Y, Gao H, Wang H, Cao X. Engineering topography: effects on nerve cell behaviors and applications in peripheral nerve repair. J Mater Chem B 2021; 9:6310-6325. [PMID: 34302164 DOI: 10.1039/d1tb00782c] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
There have been extensive studies on the application of topography in the field of tissue repair. A common feature of these studies is that the existence of topological structures in tissue repair scaffolds can effectively regulate a series of behaviors of cells and play a positive role in a variety of tissue repair and regeneration processes. This review focuses on the application of topography in the field of peripheral nerve repair. The integration of the topological structure and biomaterials to construct peripheral nerve conduits to mimic a natural peripheral nerve structure has an important role in promoting the recovery of peripheral nerve function. Therefore, in this review, we systematically analysed the structure of peripheral nerves and summarized the effects of topographic cues of different scales and shapes on the behaviors of nerve cells, including cell morphology, adhesion, proliferation, migration and differentiation. Furthermore, the application and performance of scaffolds with different topological structures in peripheral nerve repair are also discussed. This systematic summary may help to provide more effective strategies for peripheral nerve regeneration (PNR) and shed light on nervous tissue engineering and regenerative medicine.
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Affiliation(s)
- Ying Ma
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, P. R. China.
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16
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Lu Q, Zhang F, Cheng W, Gao X, Ding Z, Zhang X, Lu Q, Kaplan DL. Nerve Guidance Conduits with Hierarchical Anisotropic Architecture for Peripheral Nerve Regeneration. Adv Healthc Mater 2021; 10:e2100427. [PMID: 34038626 PMCID: PMC8295195 DOI: 10.1002/adhm.202100427] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 04/15/2021] [Indexed: 12/24/2022]
Abstract
Nerve guidance conduits with multifunctional features could offer microenvironments for improved nerve regeneration and functional recovery. However, the challenge remains to optimize multiple cues in nerve conduit systems due to the interplay of these factors during fabrication. Here, a modular assembly for the fabrication of nerve conduits is utilized to address the goal of incorporating multifunctional guidance cues for nerve regeneration. Silk-based hollow conduits with suitable size and mechanical properties, along with silk nanofiber fillers with tunable hierarchical anisotropic architectures and microporous structures, are developed and assembled into conduits. These conduits supported improves nerve regeneration in terms of cell proliferation (Schwann and PC12 cells) and growth factor secretion (BDNF, brain-derived neurotrophic factor) in vitro, and the in vivo repair and functional recovery of rat sciatic nerve defects. Nerve regeneration using these new conduit designs is comparable to autografts, providing a path towards future clinical impact.
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Affiliation(s)
- Qingqing Lu
- National Engineering Laboratory for Modern Silk and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P. R. China
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou, 215123, P. R. China
| | - Feng Zhang
- National Engineering Laboratory for Modern Silk and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P. R. China
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou, 215123, P. R. China
| | - Weinan Cheng
- Department of Orthopedics, The First Affiliated Hospital of Xiamen University, Xiamen, 361000, P. R. China
| | - Xiang Gao
- National Engineering Laboratory for Modern Silk and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P. R. China
| | - Zhaozhao Ding
- National Engineering Laboratory for Modern Silk and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P. R. China
| | - Xiaoyi Zhang
- National Engineering Laboratory for Modern Silk and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P. R. China
| | - Qiang Lu
- National Engineering Laboratory for Modern Silk and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P. R. China
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA, 02155, USA
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17
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Biofabrication of aligned structures that guide cell orientation and applications in tissue engineering. Biodes Manuf 2021. [DOI: 10.1007/s42242-020-00104-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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18
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Wang J, Cheng Y, Wang H, Wang Y, Zhang K, Fan C, Wang H, Mo X. Biomimetic and hierarchical nerve conduits from multifunctional nanofibers for guided peripheral nerve regeneration. Acta Biomater 2020; 117:180-191. [PMID: 33007489 DOI: 10.1016/j.actbio.2020.09.037] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 09/17/2020] [Accepted: 09/22/2020] [Indexed: 10/23/2022]
Abstract
Development of a functional nerve conduit to replace autografts remains a significant challenge particularly considering the compositional complexity and structural hierarchy of native peripheral nerves. In the present study, a multiscale strategy was adopted to fabricate 3D biomimetic nerve conduit from Antheraea pernyi silk fibroin (ApF)/(Poly(L-lactic acid-co-caprolactone)) (PLCL)/graphene oxide (GO) (ApF/PLCL/GO) nanofibers via nanofiber dispersion, template-molding, freeze-drying and crosslinking. The resultant conduits exhibit parallel multichannels (ϕ = 125 µm) surrounded by biomimetic fibrous fragments with tailored degradation rate and improved mechanical properties in comparison with the scaffold without GO. In vitro studies showed that such 3D biomimetic nerve scaffolds had the ability to offer an effective guiding interface for neuronal cell growth. Furthermore, these conduits showed a similarity to autografts in vivo repairing sciatic nerve defects based on a series of analysis (walking track, triceps weight, morphogenesis, vascularization, axonal regrowth and myelination). The conduits almost completely degraded within 12 weeks. These findings demonstrate that the 3D hierarchical nerve guidance conduit (NGC) with fascicle-like structure have great potential for peripheral nerve repair.
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19
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Kang MS, Lee GH, Choi GE, Yoon HG, Hyun KY. Neuroprotective Effect of Nypa fruticans Wurmb by Suppressing TRPV1 Following Sciatic Nerve Crush Injury in a Rat. Nutrients 2020; 12:E2618. [PMID: 32867278 PMCID: PMC7551127 DOI: 10.3390/nu12092618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 08/19/2020] [Accepted: 08/26/2020] [Indexed: 11/19/2022] Open
Abstract
Peripheral nerve injury can result in severe functional impairment and decreased quality of life due to loss of sensory and motor function. Nypa fruticans wurmb (NF) has been used in diverse folk remedies in East Asia. We have previously shown that Nypa fruticans wurmb extract has antinociceptive and anti-inflammatory effects by suppressing TRPV1 in the sciatic nerve injury. The present study investigated the effects of NF on the control of TRPV1 in relation to neuroprotective effects of a sciatic nerve crush injury. To evaluate the neuroprotective effects, an animal behavior test and a physiological function test were performed. Functional recovery and nerve recovery were improved in the NF and NF + SB (SB366791; TRPV1 antagonist) treated group. In the histomorphology evaluation, the neuronal regenerative effect of NF on the injured sciatic nerve was confirmed via hematoxylin and eosin (H&E) staining. In this study, the NF and NF + SB treated group showed neuroprotective and functional recovery effects from the sciatic nerve crush injury. Furthermore, the expression of NF-κB and iNOS showed a significantly suppressive effect on NF (p < 0.01), SB (p < 0.01), and NF + SB (p < 0.01) treated group at the 7th and 14th day compared to the vehicle group. This study confirmed the neuroprotective effects of NF on suppressing TRPV1 in a sciatic nerve crush injury. The findings of this study establish the effect of NF as a neurotherapeutic agent to protect the peripheral nerve after a sciatic nerve crush injury.
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Affiliation(s)
- Mi-Sun Kang
- Department of Rehabilitation Medicine, Pusan National University Yangsan Hospital, Yangsan 50612, Korea;
| | - Gil-Hyun Lee
- Department of Clinical Laboratory Science, Dong-Eui University, Busan 47340, Korea;
| | - Go-Eun Choi
- Department of Clinical Laboratory Science, College of Health Sciences, Catholic University of Pusan, Busan 46252, Korea;
| | - Hae-Gyung Yoon
- Department of Art & Design, Dong-Eui University, Busan 47340, Korea;
| | - Kyung-Yae Hyun
- Department of Clinical Laboratory Science, Dong-Eui University, Busan 47340, Korea;
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20
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Ghane N, Beigi MH, Labbaf S, Nasr-Esfahani MH, Kiani A. Design of hydrogel-based scaffolds for the treatment of spinal cord injuries. J Mater Chem B 2020; 8:10712-10738. [DOI: 10.1039/d0tb01842b] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Hydrogel-based scaffold design approaches for the treatment of spinal cord injuries.
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Affiliation(s)
- Nazanin Ghane
- Department of Cellular Biotechnology Cell Science Research Center
- Royan Institute for Biotechnology
- ACECR
- Isfahan
- Iran
| | - Mohammad-Hossein Beigi
- Department of Cellular Biotechnology Cell Science Research Center
- Royan Institute for Biotechnology
- ACECR
- Isfahan
- Iran
| | - Sheyda Labbaf
- Biomaterials Research Group
- Department of Materials Engineering
- Isfahan University of Technology
- Isfahan
- Iran
| | | | - Amirkianoosh Kiani
- Silicon Hall: Micro/Nano Manufacturing Facility
- Faculty of Engineering and Applied Science
- Ontario Tech University
- Ontario
- Canada
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21
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Carvalho CR, Oliveira JM, Reis RL. Modern Trends for Peripheral Nerve Repair and Regeneration: Beyond the Hollow Nerve Guidance Conduit. Front Bioeng Biotechnol 2019; 7:337. [PMID: 31824934 PMCID: PMC6882937 DOI: 10.3389/fbioe.2019.00337] [Citation(s) in RCA: 160] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 10/30/2019] [Indexed: 12/13/2022] Open
Abstract
Peripheral nerve repair and regeneration remains among the greatest challenges in tissue engineering and regenerative medicine. Even though peripheral nerve injuries (PNIs) are capable of some degree of regeneration, frail recovery is seen even when the best microsurgical technique is applied. PNIs are known to be very incapacitating for the patient, due to the deprivation of motor and sensory abilities. Since there is no optimal solution for tackling this problem up to this day, the evolution in the field is constant, with innovative designs of advanced nerve guidance conduits (NGCs) being reported every day. As a basic concept, a NGC should act as a physical barrier from the external environment, concomitantly acting as physical guidance for the regenerative axons across the gap lesion. NGCs should also be able to retain the naturally released nerve growth factors secreted by the damaged nerve stumps, as well as reducing the invasion of scar tissue-forming fibroblasts to the injury site. Based on the neurobiological knowledge related to the events that succeed after a nerve injury, neuronal subsistence is subjected to the existence of an ideal environment of growth factors, hormones, cytokines, and extracellular matrix (ECM) factors. Therefore, it is known that multifunctional NGCs fabricated through combinatorial approaches are needed to improve the functional and clinical outcomes after PNIs. The present work overviews the current reports dealing with the several features that can be used to improve peripheral nerve regeneration (PNR), ranging from the simple use of hollow NGCs to tissue engineered intraluminal fillers, or to even more advanced strategies, comprising the molecular and gene therapies as well as cell-based therapies.
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Affiliation(s)
- Cristiana R. Carvalho
- 3B's Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
- The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark, Guimarães, Portugal
| | - Joaquim M. Oliveira
- 3B's Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
- The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark, Guimarães, Portugal
| | - Rui L. Reis
- 3B's Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
- The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark, Guimarães, Portugal
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22
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Hou Y, Wang X, Zhang Z, Luo J, Cai Z, Wang Y, Li Y. Repairing Transected Peripheral Nerve Using a Biomimetic Nerve Guidance Conduit Containing Intraluminal Sponge Fillers. Adv Healthc Mater 2019; 8:e1900913. [PMID: 31583854 DOI: 10.1002/adhm.201900913] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 09/11/2019] [Indexed: 12/29/2022]
Abstract
Nerve guide conduits (NGCs) with geometric design have shown significant advantages in guidance of nerve reinnervation across the defect of injured peripheral nerves. It is realized that intraluminal fillers with distinctive structure can effectively provide an inner guidance for sprouting of axons and improve the permeability of NGC. In this work, a poly(lactic-co-glycolic acid) (PLGA) NGC is prepared containing intraluminal sponge fillers (labeled as ISF-NGC) and used for reconstruction of a rat sciatic nerve with a 10 mm gap. For comparison, the same procedure is applied to a single hollow PLGA NGC (labeled as H-NGC) and an autologous nerve. As evidenced by significantly improved nerve morphology and function, the ISF-NGC achieves a superior nerve repair effect over H-NGC, which is comparable to autologous nerve grafting. It is likely that the H-NGC only provides a protected tunnel for nerve fiber regrowth and axonal extension, while ISF-NGC offers an extracellular matrix-mimetic architecture as autograft to provide contact guidance for nerve reinnervation. This newly developed ISF-NGC is a promising candidate to aid nerve reinnervation across longer gaps commonly encountered in clinical cases.
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Affiliation(s)
- Yuanjing Hou
- State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of Technology Wuhan 430070 China
- Biomedical Materials and Engineering Research Center of Hubei ProvinceWuhan University of Technology Wuhan 430070 China
| | - Xinyu Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of Technology Wuhan 430070 China
- Biomedical Materials and Engineering Research Center of Hubei ProvinceWuhan University of Technology Wuhan 430070 China
| | - Zongrui Zhang
- College of Biochemical EngineeringAnhui Polytechnic University Wuhu 241000 China
| | - Jing Luo
- State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of Technology Wuhan 430070 China
- Biomedical Materials and Engineering Research Center of Hubei ProvinceWuhan University of Technology Wuhan 430070 China
| | - Zhengwei Cai
- State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of Technology Wuhan 430070 China
- Biomedical Materials and Engineering Research Center of Hubei ProvinceWuhan University of Technology Wuhan 430070 China
| | - Yiyu Wang
- School of Life Science TechnologyHubei Engineering University Xiaogan 432000 China
| | - Yi Li
- Institute of Textiles and ClothingThe Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong 999077 China
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23
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Yin K, Divakar P, Wegst UGK. Plant-Derived Nanocellulose as Structural and Mechanical Reinforcement of Freeze-Cast Chitosan Scaffolds for Biomedical Applications. Biomacromolecules 2019; 20:3733-3745. [PMID: 31454234 PMCID: PMC6800197 DOI: 10.1021/acs.biomac.9b00784] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Despite considerable recent interest in micro- and nanofibrillated cellulose as constituents of lightweight structures and scaffolds for applications that range from thermal insulation to filtration, few systematic studies have been reported to date on structure-property-processing correlations in freeze-cast chitosan-nanocellulose composite scaffolds, in general, and their application in tissue regeneration, in particular. Reported in this study are the effects of the addition of plant-derived nanocellulose fibrils (CNF), crystals (CNCs), or a blend of the two (CNB) to the biopolymer chitosan on the structure and properties of the resulting composites. Chitosan-nanocellulose composite scaffolds were freeze-cast at 10 and 1 °C/min, and their microstructures were quantified in both the dry and fully hydrated states using scanning electron and confocal microscopy, respectively. The modulus, yield strength, and toughness (work to 60% strain) were determined in compression parallel and the modulus also perpendicular to the freezing direction to quantify anisotropy. Observed were the preferential alignments of CNCs and/or fibrils parallel to the freezing direction. Additionally, observed was the self-assembly of the nanocellulose into microstruts and microbridges between adjacent cell walls (lamellae), features that affected the mechanical properties of the scaffolds. When freeze-cast at 1 °C/min, chitosan-CNF scaffolds had the highest modulus, yield strength, toughness, and smallest anisotropy ratio, followed by chitosan and the composites made with the nanocellulose blend, and that with crystalline cellulose. These results illustrate that the nanocellulose additions homogenize the mechanical properties of the scaffold through cell-wall material self-assembly, on the one hand, and add architectural features such as bridges and pillars, on the other. The latter transfer loads and enable the scaffolds to resist deformation also perpendicular to the freezing direction. The observed property profile and the materials' proven biocompatibility highlight the promise of chitosan-nanocellulose composites for a large range of applications, including those for biomedical implants and devices.
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Affiliation(s)
- Kaiyang Yin
- Thayer School of Engineering , Dartmouth College , Hanover , New Hampshire 03755-4401 , United States
| | - Prajan Divakar
- Thayer School of Engineering , Dartmouth College , Hanover , New Hampshire 03755-4401 , United States
| | - Ulrike G K Wegst
- Thayer School of Engineering , Dartmouth College , Hanover , New Hampshire 03755-4401 , United States
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24
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Sämfors S, Karlsson K, Sundberg J, Markstedt K, Gatenholm P. Biofabrication of bacterial nanocellulose scaffolds with complex vascular structure. Biofabrication 2019; 11:045010. [DOI: 10.1088/1758-5090/ab2b4f] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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25
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Exosomes from Human Gingiva-Derived Mesenchymal Stem Cells Combined with Biodegradable Chitin Conduits Promote Rat Sciatic Nerve Regeneration. Stem Cells Int 2019; 2019:2546367. [PMID: 31191669 PMCID: PMC6525800 DOI: 10.1155/2019/2546367] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 02/20/2019] [Indexed: 12/13/2022] Open
Abstract
At present, repair methods for peripheral nerve injury often fail to get satisfactory result. Although various strategies have been adopted to investigate the microenvironment after peripheral nerve injury, the underlying molecular mechanisms of neurite outgrowth remain unclear. In this study, we evaluate the effects of exosomes from gingival mesenchymal stem cells (GMSCs) combined with biodegradable chitin conduits on peripheral nerve regeneration. GMSCs were isolated from human gingival tissue and characterized by surface antigen analysis and in vitro multipotent differentiation. The cell supernatant was collected to isolate the exosomes. The exosomes were characterized by transmission electron microscopy, Western blot, and size distribution analysis. The effects of exosomes on peripheral nerve regeneration in vitro were evaluated by coculture with Schwann cells and DRGs. The chitin conduit was prepared and combined with the exosomes to repair rat sciatic nerve defect. Histology, electrophysiology, and gait analysis were used to test the effects of exosomes on sciatic nerve function recovery in vivo. We have successfully cultured GMSCs and isolated exosomes. The exosomes from GMSCs could significantly promote Schwann cell proliferation and DRG axon growth. The in vivo studies showed that chitin conduit combined with exosomes from GMSCs could significantly increase the number and diameter of nerve fibers and promote myelin formation. In addition, muscle function, nerve conduction function, and motor function were also obviously recovered. In summary, this study suggests that GMSC-derived exosomes combined with biodegradable chitin conduits are a useful and novel therapeutic intervention in peripheral nerve repair.
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26
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Altun E, Aydogdu MO, Togay SO, Sengil AZ, Ekren N, Haskoylu ME, Oner ET, Altuncu NA, Ozturk G, Crabbe-Mann M, Ahmed J, Gunduz O, Edirisinghe M. Bioinspired scaffold induced regeneration of neural tissue. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.02.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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27
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Abstract
Electrospinning is a versatile and viable technique for generating ultrathin fibers. Remarkable progress has been made with regard to the development of electrospinning methods and engineering of electrospun nanofibers to suit or enable various applications. We aim to provide a comprehensive overview of electrospinning, including the principle, methods, materials, and applications. We begin with a brief introduction to the early history of electrospinning, followed by discussion of its principle and typical apparatus. We then discuss its renaissance over the past two decades as a powerful technology for the production of nanofibers with diversified compositions, structures, and properties. Afterward, we discuss the applications of electrospun nanofibers, including their use as "smart" mats, filtration membranes, catalytic supports, energy harvesting/conversion/storage components, and photonic and electronic devices, as well as biomedical scaffolds. We highlight the most relevant and recent advances related to the applications of electrospun nanofibers by focusing on the most representative examples. We also offer perspectives on the challenges, opportunities, and new directions for future development. At the end, we discuss approaches to the scale-up production of electrospun nanofibers and briefly discuss various types of commercial products based on electrospun nanofibers that have found widespread use in our everyday life.
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Affiliation(s)
- Jiajia Xue
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
| | - Tong Wu
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
| | - Yunqian Dai
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, Jiangsu 211189, People’s Republic of China
| | - Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
- School of Chemistry and Biochemistry, School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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Rao F, Yuan Z, Li M, Yu F, Fang X, Jiang B, Wen Y, Zhang P. Expanded 3D nanofibre sponge scaffolds by gas-foaming technique enhance peripheral nerve regeneration. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2019; 47:491-500. [PMID: 30942090 DOI: 10.1080/21691401.2018.1557669] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Feng Rao
- Department of Orthopedics and Trauma, Peking University People’s Hospital, Beijing, China
| | - Zhipeng Yuan
- School of Chemistry & Biological Engineering, University of Science and Technology Beijing, Beijing, China
| | - Ming Li
- Department of Orthopedics and Trauma, Peking University People’s Hospital, Beijing, China
| | - Fei Yu
- Department of Orthopedics and Trauma, Peking University People’s Hospital, Beijing, China
| | - Xingxing Fang
- Department of Orthopedics and Trauma, Peking University People’s Hospital, Beijing, China
| | - Baoguo Jiang
- Department of Orthopedics and Trauma, Peking University People’s Hospital, Beijing, China
| | - Yongqiang Wen
- School of Chemistry & Biological Engineering, University of Science and Technology Beijing, Beijing, China
| | - Peixun Zhang
- Department of Orthopedics and Trauma, Peking University People’s Hospital, Beijing, China
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Wang ZY, Qin LH, Zhang WG, Zhang PX, Jiang BG. Qian-Zheng-San promotes regeneration after sciatic nerve crush injury in rats. Neural Regen Res 2019; 14:683-691. [PMID: 30632509 PMCID: PMC6352607 DOI: 10.4103/1673-5374.247472] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Qian-Zheng-San, a traditional Chinese prescription consisting of Typhonii Rhizoma, Bombyx Batryticatus, Scorpio, has been found to play an active therapeutic role in central nervous system diseases. However, it is unclear whether Qian-Zheng-San has therapeutic value for peripheral nerve injury. Therefore, we used Sprague-Dawley rats to investigate this. A sciatic nerve crush injury model was induced by clamping the right sciatic nerve. Subsequently, rats in the treatment group were administered 2 mL Qian-Zheng-San (1.75 g/mL) daily as systemic therapy for 1, 2, 4, or 8 weeks. Rats in the control group were not administered Qian-Zheng-San. Rats in sham group did not undergo surgery and systemic therapy. Footprint analysis was used to assess nerve motor function. Electrophysiological experiments were used to detect nerve conduction function. Immunofluorescence staining was used to assess axon counts and morphological analysis. Immunohistochemical staining was used to observe myelin regeneration of the sciatic nerve and the number of motoneurons in the anterior horn of the spinal cord. At 2 and 4 weeks postoperatively, the sciatic nerve function index, nerve conduction velocity, the number of distant regenerated axons and the axon diameter of the sciatic nerve increased in the Qian-Zheng-San treatment group compared with the control group. At 2 weeks postoperatively, nerve fiber diameter, myelin thickness, and the number of motor neurons in the lumbar spinal cord anterior horn increased in the Qian-Zheng-San treatment group compared with the control group. These results indicate that Qian-Zheng-San has a positive effect on peripheral nerve regeneration.
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Affiliation(s)
- Zhi-Yong Wang
- Department of Anatomy and Histo-embryology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Li-Hua Qin
- Department of Anatomy and Histo-embryology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Wei-Guang Zhang
- Department of Anatomy and Histo-embryology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Pei-Xun Zhang
- Department of Trauma and Orthopedics, Peking University People's Hospital, Beijing, China
| | - Bao-Guo Jiang
- Department of Trauma and Orthopedics, Peking University People's Hospital, Beijing, China
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Zhang PX, Han N, Kou YH, Zhu QT, Liu XL, Quan DP, Chen JG, Jiang BG. Tissue engineering for the repair of peripheral nerve injury. Neural Regen Res 2019; 14:51-58. [PMID: 30531070 PMCID: PMC6263012 DOI: 10.4103/1673-5374.243701] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Peripheral nerve injury is a common clinical problem and affects the quality of life of patients. Traditional restoration methods are not satisfactory. Researchers increasingly focus on the field of tissue engineering. The three key points in establishing a tissue engineering material are the biological scaffold material, the seed cells and various growth factors. Understanding the type of nerve injury, the construction of scaffold and the process of repair are necessary to solve peripheral nerve injury and promote its regeneration. This review describes the categories of peripheral nerve injury, fundamental research of peripheral nervous tissue engineering and clinical research on peripheral nerve scaffold material, and paves a way for related research and the use of conduits in clinical practice.
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Affiliation(s)
| | - Na Han
- Peking University People's Hospital, Beijing, China
| | - Yu-Hui Kou
- Peking University People's Hospital, Beijing, China
| | - Qing-Tang Zhu
- The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong Province, China
| | - Xiao-Lin Liu
- The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong Province, China
| | - Da-Ping Quan
- The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong Province, China
| | - Jian-Guo Chen
- School of Life Science, Peking University, Beijing, China
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Qiao W, Lu L, Wu G, An X, Li D, Guo J. DPSCs seeded in acellular nerve grafts processed by Myroilysin improve nerve regeneration. J Biomater Appl 2018; 33:819-833. [PMID: 30449254 DOI: 10.1177/0885328218812136] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Since synthetic nerve conduits do not exhibit ideal regeneration characteristics, they are generally inadequate substitutes for autologous nerve grafts in the repair of long peripheral nerve defects. To resolve this problem, in this study, a nerve regeneration acellular nerve graft (ANG) with homologous dental pulp stem cells (DPSCs) was constructed. Xenogeneic ANG was processed by Myroilysin to completely remove cells and myelin sheath, while preserving extracellular matrix (ECM) microstructure of the natural nerve. The study revealed that ANG could support cell attachment and proliferation and did not stimulate a vigorous host rejection response. After inoculation of rabbit DPSCs (r-DPSCs) onto ANG, cells were observed to align along the longitudinal axis of the acellular nerve matrix (ANM) and persistently express NGF and BDNF. Undifferentiated r-DPSCs also presented glial cell characteristics and promoted nerve regeneration after transplantation in vivo. We repaired 1 cm purebred New Zealand White Rabbits sciatic nerve defects using this nerve graft construction, and nerve gap regeneration was indicated by electrophysiological and histological analysis. Therefore, we conclude that the combination of an ANG processed by Myroilysin with DPSCs providing a microenvironment that increases nerve regeneration for repairing peripheral nerve defects.
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Affiliation(s)
- Wenlan Qiao
- Department of Orthodontics, School of Stomatology, Shandong University, Shandong Provincial Key Laboratory of Oral Tissue Regeneration, Jinan, PR China
- Department of Stomatology, Qilu Hospital, and Institute of Stomatology, Shandong University, Jinan, PR China
| | - Lu Lu
- Department of Orthodontics, School of Stomatology, Shandong University, Shandong Provincial Key Laboratory of Oral Tissue Regeneration, Jinan, PR China
| | - Guangxue Wu
- Department of Orthodontics, School of Stomatology, Shandong University, Shandong Provincial Key Laboratory of Oral Tissue Regeneration, Jinan, PR China
| | - Xianglian An
- Department of Stomatology, Qilu Hospital, and Institute of Stomatology, Shandong University, Jinan, PR China
| | - Dong Li
- Department of Cryomedicine Lab, Qilu Hospital of Shandong University, Jinan, PR China
| | - Jing Guo
- Department of Orthodontics, School of Stomatology, Shandong University, Shandong Provincial Key Laboratory of Oral Tissue Regeneration, Jinan, PR China
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Alsmadi NZ, Bendale GS, Kanneganti A, Shihabeddin T, Nguyen AH, Hor E, Dash S, Johnston B, Granja-Vazquez R, Romero-Ortega MI. Glial-derived growth factor and pleiotrophin synergistically promote axonal regeneration in critical nerve injuries. Acta Biomater 2018; 78:165-177. [PMID: 30059799 DOI: 10.1016/j.actbio.2018.07.048] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Revised: 07/16/2018] [Accepted: 07/27/2018] [Indexed: 12/14/2022]
Abstract
The repair of nerve gap injuries longer than 3 cm is limited by the need to sacrifice donor tissue and the morbidity associated with the autograft gold standard, while decellularized grafts and biodegradable conduits are effective only in short nerve defects. The advantage of isogenic nerve implants seems to be the release of various growth factors by the denervated Schwann cells. We evaluated the effect of vascular endothelial growth factor, neurotrophins, and pleiotrophin (PTN) supplementation of multi-luminal conduits, in the repair of 3 and 4 cm nerve gaps in the rabbit peroneal nerve. In vitro screening revealed a synergistic regenerative effect of PTN with glial-derived neurotrophic factor (GDNF) in promoting sensory axon density, and motor axonal growth from spinal cord explants. In vivo, pleiotrophins were able to support nerve regrowth across a 3 cm gap. In the 4 cm lesions, PTN-GDNF had a modest effect in the number of axons distal to the implant, while increasing the mean axon diameter (1 ± 0.4; p ≤ 0.001) over PTN or GDNF alone (0.80 ± 0.2, 0.84 ± 0.5; respectively). Some regenerated axons reinnervated muscle targets as indicated by neuromuscular junction staining. However, many were wrapped in Remak bundles, suggesting a delay in axonal sorting, explaining the limited electrophysiological function of the reinnervated muscle, and the modest recovery in toe spreading in the PTN-GDNF repaired animals. These results support the use of synergistic neurotrophic/pleiotrophic growth factors in long gap repair and underscore the need for re-myelination strategies distal to the injury site. STATEMENT OF SIGNIFICANCE Nerve injuries due to trauma or tumor resection often result in long gaps that are challenging to repair. The best clinical option demands the use of autologous grafts that are associated with serious side effects. Bioengineered nerves are considered a good alternative, particularly if supplemented with growth factors, but current options do not match the regenerative capacity of autografts. This study revealed the synergistic effect of neurotrophins and pleiotrophins designed to achieve a broad cellular regenerative effect, and that GDNF-PTN are able to mediated axonal growth and partial functional recovery in a 4 cm nerve gap injury, albeit delays in remyelination. This report underscores the need for defining an optimal growth factor support for biosynthetic nerve implants.
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Peng Y, Li KY, Chen YF, Li XJ, Zhu S, Zhang ZY, Wang X, Duan LN, Luo ZJ, Du JJ, Wang JC. Beagle sciatic nerve regeneration across a 30 mm defect bridged by chitosan/PGA artificial nerve grafts. Injury 2018; 49:1477-1484. [PMID: 29921534 DOI: 10.1016/j.injury.2018.03.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2017] [Revised: 03/19/2018] [Accepted: 03/20/2018] [Indexed: 02/02/2023]
Abstract
Longitudinally oriented microstructures are essential for a nerve scaffold to promote the significant regeneration of injured peripheral axons across nerve gaps. In the current study, we present a novel nerve-guiding collagen-chitosan (CCH) scaffold that facilitated the repair of 30 mm-long sciatic nerve defects in beagles. The CCH scaffolds were observed with a scanning electron microscope. Eighteen beagles were equally divided into CCH group, autograft group and non-graft group. The posture and gait of each dog was recorded at 12 and 24 weeks after surgery. Electrophysiological tests, Fluoro-Gold retrograde tracing test, Histological assessment of gastrocnemius and immunofluorescent staining of nerve regeneration were performed. Our investigation of regenerated sciatic nerves indicated that a CCH scaffold strongly supported directed axon regeneration in a manner similar to that achieved by autologous nerve transplantation. In vivo animal experiments showed that the CCH scaffold achieved nerve regeneration and functional recovery equivalent to that achieved by an autograft but without requiring the exogenous delivery of regenerative agents or cell transplantation. We conclude that CCH nerve guides show great promise as a method for repairing peripheral nerve defects.
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Affiliation(s)
- Ye Peng
- Department of Orthopaedics, Air Force General Hospital of PLA, Beijing, 100142, China
| | - Kai-Yuan Li
- Department of Emergency, Chinese PLA General Hospital, Beijing 100853, China
| | - Yu-Fei Chen
- Department of Orthopaedics, Air Force General Hospital of PLA, Beijing, 100142, China
| | - Xiao-Jie Li
- Department of Orthopaedics, Air Force General Hospital of PLA, Beijing, 100142, China
| | - Shu Zhu
- Department of Orthopaedics, Air Force General Hospital of PLA, Beijing, 100142, China
| | - Zheng-Yu Zhang
- Department of Orthopaedics, Air Force General Hospital of PLA, Beijing, 100142, China
| | - Xiao Wang
- Department of Orthopaedics, Air Force General Hospital of PLA, Beijing, 100142, China
| | - Li-Na Duan
- Department of Orthopaedics, Air Force General Hospital of PLA, Beijing, 100142, China
| | - Zhuo-Jing Luo
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China
| | - Jun-Jie Du
- Department of Orthopaedics, Air Force General Hospital of PLA, Beijing, 100142, China.
| | - Jian-Chang Wang
- Department of Orthopaedics, Air Force General Hospital of PLA, Beijing, 100142, China.
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Wieringa PA, Gonçalves de Pinho AR, Micera S, Wezel RJA, Moroni L. Biomimetic Architectures for Peripheral Nerve Repair: A Review of Biofabrication Strategies. Adv Healthc Mater 2018; 7:e1701164. [PMID: 29349931 DOI: 10.1002/adhm.201701164] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 11/13/2017] [Indexed: 12/19/2022]
Abstract
Biofabrication techniques have endeavored to improve the regeneration of the peripheral nervous system (PNS), but nothing has surpassed the performance of current clinical practices. However, these current approaches have intrinsic limitations that compromise patient care. The "gold standard" autograft provides the best outcomes but requires suitable donor material, while implantable hollow nerve guide conduits (NGCs) can only repair small nerve defects. This review places emphasis on approaches that create structural cues within a hollow NGC lumen in order to match or exceed the regenerative performance of the autograft. An overview of the PNS and nerve regeneration is provided. This is followed by an assessment of reported devices, divided into three major categories: isotropic hydrogel fillers, acting as unstructured interluminal support for regenerating nerves; fibrous interluminal fillers, presenting neurites with topographical guidance within the lumen; and patterned interluminal scaffolds, providing 3D support for nerve growth via structures that mimic native PNS tissue. Also presented is a critical framework to evaluate the impact of reported outcomes. While a universal and versatile nerve repair strategy remains elusive, outlined here is a roadmap of past, present, and emerging fabrication techniques to inform and motivate new developments in the field of peripheral nerve regeneration.
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Affiliation(s)
- Paul A. Wieringa
- Department of Complex Tissue RegenerationMERLN Institute for Technology‐Inspired Regenerative MedicineMaastricht University Universiteitssingel 40 Maastricht 6229 ER The Netherlands
| | - Ana Rita Gonçalves de Pinho
- Tissue Regeneration DepartmentMIRA InstituteUniversity of Twente Drienerlolaan 5 Enschede 7522 NB The Netherlands
| | - Silvestro Micera
- BioRobotics InstituteScuola Superiore Sant'Anna Viale Rinaldo Piaggio 34 Pontedera 56025 Italy
- Translational Neural Engineering LaboratoryEcole Polytechnique Federale de Lausanne Ch. des Mines 9 Geneva CH‐1202 Switzerland
| | - Richard J. A. Wezel
- BiophysicsDonders Institute for BrainCognition and BehaviourRadboud University Kapittelweg 29 Nijmegen 6525 EN The Netherlands
- Biomedical Signals and SystemsMIRA InstituteUniversity of Twente Drienerlolaan 5 Enschede 7522 NB The Netherlands
| | - Lorenzo Moroni
- Department of Complex Tissue RegenerationMERLN Institute for Technology‐Inspired Regenerative MedicineMaastricht University Universiteitssingel 40 Maastricht 6229 ER The Netherlands
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Spearman BS, Desai VH, Mobini S, McDermott MD, Graham JB, Otto KJ, Judy JW, Schmidt CE. Tissue-Engineered Peripheral Nerve Interfaces. ADVANCED FUNCTIONAL MATERIALS 2018; 28:1701713. [PMID: 37829558 PMCID: PMC10569514 DOI: 10.1002/adfm.201701713] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2023]
Abstract
Research on neural interfaces has historically concentrated on development of systems for the brain; however, there is increasing interest in peripheral nerve interfaces (PNIs) that could provide benefit when peripheral nerve function is compromised, such as for amputees. Efforts focus on designing scalable and high-performance sensory and motor peripheral nervous system interfaces. Current PNIs face several design challenges such as undersampling of signals from the thousands of axons, nerve-fiber selectivity, and device-tissue integration. To improve PNIs, several researchers have turned to tissue engineering. Peripheral nerve tissue engineering has focused on designing regeneration scaffolds that mimic normal nerve extracellular matrix composition, provide advanced microarchitecture to stimulate cell migration, and have mechanical properties like the native nerve. By combining PNIs with tissue engineering, the goal is to promote natural axon regeneration into the devices to facilitate close contact with electrodes; in contrast, traditional PNIs rely on insertion or placement of electrodes into or around existing nerves, or do not utilize materials to actively facilitate axon regeneration. This review presents the state-of-the-art of PNIs and nerve tissue engineering, highlights recent approaches to combine neural-interface technology and tissue engineering, and addresses the remaining challenges with foreign-body response.
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Affiliation(s)
- Benjamin S Spearman
- Crayton Pruitt Family Department of Biomedical Engineering, The University of Florida, 1275 Center Dr., BMS Building JG-56, 116131, Gainesville, FL 32611-6131
| | - Vidhi H Desai
- Department of Electrical and Computer Engineering, The University of Florida, 216 Larsen Hall, 116200, Gainesville, FL 32611-6200
- Nanoscience Institute for Medical and Engineering Technology, The University of Florida, 1041 Center Drive, 116621, Gainesville, FL 32611-6621
| | - Sahba Mobini
- Crayton Pruitt Family Department of Biomedical Engineering, The University of Florida, 1275 Center Dr., BMS Building JG-56, 116131, Gainesville, FL 32611-6131
| | - Matthew D McDermott
- Crayton Pruitt Family Department of Biomedical Engineering, The University of Florida, 1275 Center Dr., BMS Building JG-56, 116131, Gainesville, FL 32611-6131
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Dr., West Lafayette, IN 47907-2032
| | - James B Graham
- Crayton Pruitt Family Department of Biomedical Engineering, The University of Florida, 1275 Center Dr., BMS Building JG-56, 116131, Gainesville, FL 32611-6131
| | - Kevin J Otto
- Crayton Pruitt Family Department of Biomedical Engineering, The University of Florida, 1275 Center Dr., BMS Building JG-56, 116131, Gainesville, FL 32611-6131
- Nanoscience Institute for Medical and Engineering Technology, The University of Florida, 1041 Center Drive, 116621, Gainesville, FL 32611-6621
- Department of Neuroscience, The University of Florida, 1149 Newell Dr., Room L1-100, 100244, Gainesville, FL 32610-0244
- Department of Neurology, The University of Florida, 2000 SW Archer Rd., Third Floor, 100383, Gainesville, FL 32610
| | - Jack W Judy
- Crayton Pruitt Family Department of Biomedical Engineering, The University of Florida, 1275 Center Dr., BMS Building JG-56, 116131, Gainesville, FL 32611-6131
- Department of Electrical and Computer Engineering, The University of Florida, 216 Larsen Hall, 116200, Gainesville, FL 32611-6200
- Nanoscience Institute for Medical and Engineering Technology, The University of Florida, 1041 Center Drive, 116621, Gainesville, FL 32611-6621
| | - Christine E Schmidt
- Crayton Pruitt Family Department of Biomedical Engineering, The University of Florida, 1275 Center Dr., BMS Building JG-56, 116131, Gainesville, FL 32611-6131
- Nanoscience Institute for Medical and Engineering Technology, The University of Florida, 1041 Center Drive, 116621, Gainesville, FL 32611-6621
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Huang L, Zhu L, Shi X, Xia B, Liu Z, Zhu S, Yang Y, Ma T, Cheng P, Luo K, Huang J, Luo Z. A compound scaffold with uniform longitudinally oriented guidance cues and a porous sheath promotes peripheral nerve regeneration in vivo. Acta Biomater 2018; 68:223-236. [PMID: 29274478 DOI: 10.1016/j.actbio.2017.12.010] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 12/06/2017] [Accepted: 12/07/2017] [Indexed: 12/17/2022]
Abstract
Scaffolds with inner fillers that convey directional guidance cues represent promising candidates for nerve repair. However, incorrect positioning or non-uniform distribution of intraluminal fillers might result in regeneration failure. In addition, proper porosity (to enhance nutrient and oxygen exchange but prevent fibroblast infiltration) and mechanical properties (to ensure fixation and to protect regenerating axons from compression) of the outer sheath are also highly important for constructing advanced nerve scaffolds. In this study, we constructed a compound scaffold using a stage-wise strategy, including directionally freezing orientated collagen-chitosan (O-CCH) filler, electrospinning poly(ε-caprolactone) (PCL) sheaths and assembling O-CCH/PCL scaffolds. Based on scanning electron microscopy (SEM) and mechanical tests, a blend of collagen/chitosan (1:1) was selected for filler fabrication, and a wall thickness of 400 μm was selected for PCL sheath production. SEM and three-dimensional (3D) reconstruction further revealed that the O-CCH filler exhibited a uniform, longitudinally oriented microstructure (over 85% of pores were 20-50 μm in diameter). The electrospun PCL porous sheath with pore sizes of 6.5 ± 3.3 μm prevented fibroblast invasion. The PCL sheath exhibited comparable mechanical properties to commercially available nerve conduits, and the O-CCH filler showed a physiologically relevant substrate stiffness of 2.0 ± 0.4 kPa. The differential degradation time of the filler and sheath allows the O-CCH/PCL scaffold to protect regenerating axons from compression stress while providing enough space for regenerating nerves. In vitro and in vivo studies indicated that the O-CCH/PCL scaffolds could promote axonal regeneration and Schwann cell migration. More importantly, functional results indicated that the CCH/PCL compound scaffold induced comparable functional recovery to that of the autograft group at the end of the study. Our findings demonstrated that the O-CCH/PCL scaffold with uniform longitudinal guidance filler and a porous sheath exhibits favorable properties for clinical use and promotes nerve regeneration and functional recovery. The O-CCH/PCL scaffold provides a promising new path for developing an optimal therapeutic alternative for peripheral nerve reconstruction. STATEMENT OF SIGNIFICANCE Scaffolds with inner fillers displaying directional guidance cues represent a promising candidate for nerve repair. However, further clinical translation should pay attention to the problem of non-uniform distribution of inner fillers, the porosity and mechanical properties of the outer sheath and the morphological design facilitating operation. In this study, a stage-wise fabrication strategy was used, which made it possible to develop an O-CCH/PCL compound scaffold with a uniform longitudinally oriented inner filler and a porous outer sheath. The uniform distribution of the pores in the O-CCH/PCL scaffold provides a solution to resolve the problem of non-uniform distribution of inner fillers, which impede the clinical translation of scaffolds with longitudinal microstructured fillers, especially for aligned-fiber-based scaffolds. In vitro and in vivo studies indicated that the O-CCH/PCL scaffolds could provide topographical cues for axonal regeneration and SC migration, which were not found for random scaffolds (with random microstructure resemble sponge-based scaffolds). The electrospun porous PCL sheath of the O-CCH/PCL scaffold not only prevented fibroblast infiltration, but also satisfied the mechanical requirements for clinical use, paving the way for clinical translation. The differential degradation time of the O-CCH filler and the PCL sheath makes O-CCH/PCL scaffold able to provide long protection for regenerating axons from compression stress, but enough space for regenerating nerve. These findings highlight the possibility of developing an optimal therapeutic alternative for nerve defects using the O-CCH/PCL scaffold.
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Affiliation(s)
- Liangliang Huang
- Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Lei Zhu
- Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Xiaowei Shi
- Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Bing Xia
- Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Zhongyang Liu
- Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Shu Zhu
- Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Yafeng Yang
- Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Teng Ma
- Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Pengzhen Cheng
- Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Kai Luo
- Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Jinghui Huang
- Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China.
| | - Zhuojing Luo
- Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China.
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Sarker M, Naghieh S, McInnes AD, Schreyer DJ, Chen X. Strategic Design and Fabrication of Nerve Guidance Conduits for Peripheral Nerve Regeneration. Biotechnol J 2018; 13:e1700635. [PMID: 29396994 DOI: 10.1002/biot.201700635] [Citation(s) in RCA: 108] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 01/25/2018] [Indexed: 12/23/2022]
Abstract
Nerve guidance conduits (NGCs) have been drawing considerable attention as an aid to promote regeneration of injured axons across damaged peripheral nerves. Ideally, NGCs should include physical and topographic axon guidance cues embedded as part of their composition. Over the past decades, much progress has been made in the development of NGCs that promote directional axonal regrowth so as to repair severed nerves. This paper briefly reviews the recent designs and fabrication techniques of NGCs for peripheral nerve regeneration. Studies associated with versatile design and preparation of NGCs fabricated with either conventional or rapid prototyping (RP) techniques have been examined and reviewed. The effect of topographic features of the filler material as well as porous structure of NGCs on axonal regeneration has also been examined from the previous studies. While such strategies as macroscale channels, lumen size, groove geometry, use of hydrogel/matrix, and unidirectional freeze-dried surface are seen to promote nerve regeneration, shortcomings such as axonal dispersion and wrong target reinnervation still remain unsolved. On this basis, future research directions are identified and discussed.
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Affiliation(s)
- Md Sarker
- Division of Biomedical Engineering College of Engineering University of Saskatchewan, 57 campus drive, SK S7N 5A9, Saskatoon, SK, Canada
| | - Saman Naghieh
- Division of Biomedical Engineering College of Engineering University of Saskatchewan, 57 campus drive, SK S7N 5A9, Saskatoon, SK, Canada
| | - Adam D McInnes
- Division of Biomedical Engineering College of Engineering University of Saskatchewan, 57 campus drive, SK S7N 5A9, Saskatoon, SK, Canada
| | - David J Schreyer
- Department of Anatomy and Cell Biology College of Medicine University of Saskatchewan, Saskatoon, SK S7N 5A2, Canada
| | - Xiongbiao Chen
- Division of Biomedical Engineering College of Engineering University of Saskatchewan, 57 campus drive, SK S7N 5A9, Saskatoon, SK, Canada.,Department of Mechanical Engineering College of Engineering University of Saskatchewan, Saskatoon, SK S7N 5A9, Canada
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Choi J, Kim JH, Jang JW, Kim HJ, Choi SH, Kwon SW. Decellularized sciatic nerve matrix as a biodegradable conduit for peripheral nerve regeneration. Neural Regen Res 2018; 13:1796-1803. [PMID: 30136695 PMCID: PMC6128056 DOI: 10.4103/1673-5374.237126] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
The use of autologous nerve grafts remains the gold standard for treating nerve defects, but current nerve repair techniques are limited by donor tissue availability and morbidity associated with tissue loss. Recently, the use of conduits in nerve injury repair, made possible by tissue engineering, has shown therapeutic potential. We manufactured a biodegradable, collagen-based nerve conduit containing decellularized sciatic nerve matrix and compared this with a silicone conduit for peripheral nerve regeneration using a rat model. The collagen-based conduit contains nerve growth factor, brain-derived neurotrophic factor, and laminin, as demonstrated by enzyme-linked immunosorbent assay. Scanning electron microscopy images showed that the collagen-based conduit had an outer wall to prevent scar tissue infiltration and a porous inner structure to allow axonal growth. Rats that were implanted with the collagen-based conduit to bridge a sciatic nerve defect experienced significantly improved motor and sensory nerve functions and greatly enhanced nerve regeneration compared with rats in the sham control group and the silicone conduit group. Our results suggest that the biodegradable collagen-based nerve conduit is more effective for peripheral nerve regeneration than the silicone conduit.
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Affiliation(s)
- Jongbae Choi
- R&D Center, Genewel Co., Ltd., Seongnam-si, Gyeonggi-do, Korea
| | - Jun Ho Kim
- R&D Center, Genewel Co., Ltd., Seongnam-si, Gyeonggi-do, Korea
| | - Ji Wook Jang
- R&D Center, Genewel Co., Ltd., Seongnam-si, Gyeonggi-do, Korea
| | - Hyun Jung Kim
- R&D Center, Genewel Co., Ltd., Seongnam-si, Gyeonggi-do, Korea
| | - Sung Hoon Choi
- Department of Surgery, CHA Bundang Medical Center, CHA University, Seongnam-si, Gyeonggi-do, Korea
| | - Sung Won Kwon
- Department of Surgery, CHA Bundang Medical Center, CHA University, Seongnam-si, Gyeonggi-do, Korea
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Liu Z, Zhu S, Liu L, Ge J, Huang L, Sun Z, Zeng W, Huang J, Luo Z. A magnetically responsive nanocomposite scaffold combined with Schwann cells promotes sciatic nerve regeneration upon exposure to magnetic field. Int J Nanomedicine 2017; 12:7815-7832. [PMID: 29123395 PMCID: PMC5661463 DOI: 10.2147/ijn.s144715] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Peripheral nerve repair is still challenging for surgeons. Autologous nerve transplantation is the acknowledged therapy; however, its application is limited by the scarcity of available donor nerves, donor area morbidity, and neuroma formation. Biomaterials for engineering artificial nerves, particularly materials combined with supportive cells, display remarkable promising prospects. Schwann cells (SCs) are the absorbing seeding cells in peripheral nerve engineering repair; however, the attenuated biologic activity restricts their application. In this study, a magnetic nanocomposite scaffold fabricated from magnetic nanoparticles and a biodegradable chitosan-glycerophosphate polymer was made. Its structure was evaluated and characterized. The combined effects of magnetic scaffold (MG) with an applied magnetic field (MF) on the viability of SCs and peripheral nerve injury repair were investigated. The magnetic nanocomposite scaffold showed tunable magnetization and degradation rate. The MGs synergized with the applied MF to enhance the viability of SCs after transplantation. Furthermore, nerve regeneration and functional recovery were promoted by the synergism of SCs-loaded MGs and MF. Based on the current findings, the combined application of MGs and SCs with applied MF is a promising therapy for the engineering of peripheral nerve regeneration.
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Affiliation(s)
- Zhongyang Liu
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi
| | - Shu Zhu
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi
| | - Liang Liu
- Department of Orthopedics, No 161 Hospital of PLA, Wuhan, Hubei
| | - Jun Ge
- Department of Orthopedics, No 323 Hospital of PLA, Xi’an, Shaanxi
- Department of Anatomy, Fourth Military Medical University, Xi’an, Shaanxi
| | - Liangliang Huang
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi
| | - Zhen Sun
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi
| | - Wen Zeng
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi’an, Shaanxi, People’s Republic of China
| | - Jinghui Huang
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi
| | - Zhuojing Luo
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi
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Sun B, Zhou Z, Wu T, Chen W, Li D, Zheng H, El-Hamshary H, Al-Deyab SS, Mo X, Yu Y. Development of Nanofiber Sponges-Containing Nerve Guidance Conduit for Peripheral Nerve Regeneration in Vivo. ACS APPLIED MATERIALS & INTERFACES 2017; 9:26684-26696. [PMID: 28718615 DOI: 10.1021/acsami.7b06707] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In the study of hollow nerve guidance conduit (NGC), the dispersion of regenerated axons always confused researchers. To address this problem, filler-containing NGC was prepared, which showed better effect in the application of nerve tissue engineering. In this study, nanofiber sponges with abundant macropores, high porosity, and superior compressive strength were fabricated by electrospinning and freeze-drying. Poly(l-lactic acid-co-ε-caprolactone)/silk fibroin (PLCL/SF) nanofiber sponges were used as filler to prepare three-dimensional nanofiber sponges-containing (NS-containing) NGC. In order to study the effect of fillers for nerve regeneration, hollow NGC was set as control. In vitro cell viability studies indicated that the NS-containing NGC could enhance the proliferation of Schwann cells (SCs) due to the macroporous structure. The results of hematoxylin-eosin (HE) and immunofluorescence staining confirmed that SCs infiltrated into the nanofiber sponges. Subsequently, the NS-containing NGC was implanted in a rat sciatic nerve defect model to evaluate the effect in vivo. NS-containing NGC group performed better in nerve function recovery than hollow NGC group. In consideration of the walking track and triceps weight analysis, NS-containing NGC was close to the autograft group. In addition, histological and morphological analyses with HE and toluidine blue (TB) staining, and transmission electron microscope (TEM) were conducted. Better nerve regeneration was observed on NS-containing NGC group both quantitatively and qualitatively. Furthermore, the results of three indexes' immuno-histochemistry and two indexes' immunofluorescence all indicated good nerve regeneration of NS-containing NGC as well, compared with hollow NGC. The results demonstrated NS-containing NGC had great potential in the application of peripheral nerve repair.
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Affiliation(s)
- Binbin Sun
- State Key Lab for Modification of Chemical Fibers & Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University , Shanghai 201620, China
| | - Zifei Zhou
- Department of Orthopaedic Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine , Shanghai 200080, China
| | - Tong Wu
- State Key Lab for Modification of Chemical Fibers & Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University , Shanghai 201620, China
| | - Weiming Chen
- State Key Lab for Modification of Chemical Fibers & Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University , Shanghai 201620, China
| | - Dawei Li
- State Key Lab for Modification of Chemical Fibers & Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University , Shanghai 201620, China
| | - Hao Zheng
- State Key Lab for Modification of Chemical Fibers & Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University , Shanghai 201620, China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University , Chengdu 610065, China
| | - Hany El-Hamshary
- Department of Chemistry, College of Science, King Saud University , Riyadh 11451, Kingdom of Saudi Arabia
- Department of Chemistry, Faculty of Science, Tanta University , Tanta 31527, Egypt
| | - Salem S Al-Deyab
- Department of Chemistry, College of Science, King Saud University , Riyadh 11451, Kingdom of Saudi Arabia
| | - Xiumei Mo
- State Key Lab for Modification of Chemical Fibers & Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University , Shanghai 201620, China
- Shandong International Biotechnology Park Development Company, Ltd. , Yantai 264003, China
| | - Yinxian Yu
- Department of Orthopaedic Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine , Shanghai 200080, China
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Suesca E, Dias A, Braga M, de Sousa H, Fontanilla M. Multifactor analysis on the effect of collagen concentration, cross-linking and fiber/pore orientation on chemical, microstructural, mechanical and biological properties of collagen type I scaffolds. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 77:333-341. [DOI: 10.1016/j.msec.2017.03.243] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Revised: 01/07/2017] [Accepted: 03/25/2017] [Indexed: 02/06/2023]
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Du J, Liu J, Yao S, Mao H, Peng J, Sun X, Cao Z, Yang Y, Xiao B, Wang Y, Tang P, Wang X. Prompt peripheral nerve regeneration induced by a hierarchically aligned fibrin nanofiber hydrogel. Acta Biomater 2017; 55:296-309. [PMID: 28412554 DOI: 10.1016/j.actbio.2017.04.010] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Revised: 04/01/2017] [Accepted: 04/11/2017] [Indexed: 12/25/2022]
Abstract
Fibrin plays a crucial role in peripheral nerve regeneration, which could occur spontaneously in the format of longitudinally oriented fibrin cables during the initial stage of nerve regeneration. This fibrin cable can direct migration and proliferation of Schwann cells and axonal regrowth, which is very important to nerve regeneration. In the present study, we prepared a three-dimensional hierarchically aligned fibrin nanofiber hydrogel (AFG) through electrospinning and molecular self-assembly to resemble the architecture and biological function of the native fibrin cable. The AFG displayed a hierarchically aligned topography as well as low elasticity (∼1.5kPa) that were similar to nerve extracellular matrix (ECM) and the native fibrin cable. Rapid, directional cell adhesion and migration of Schwann cells (SCs) and dorsal root ganglions were observed in vitro. The AFG was then used as a potential intraluminal substrate in a bioengineered chitosan tube to bridge a 10-mm-long sciatic nerve gap in rats. We found that the AFG served as a beneficial microenvironment to support SCs cable formation and axonal regrowth within 2weeks. Further histological and morphological analyses as well as electrophysiological and functional examinations were performed after AFG implantation for up to 12weeks. The results from morphological analysis and electrophysiological examination indicated that regenerative outcomes achieved by our developed graft were close to those by an autologous nerve graft, but superior to those by hollow chitosan tubes (hCST) and random fibrin nanofiber hydrogel (RFG). Our results demonstrate that the AFG creates an instructive microenvironment by mimicking the native fibrin cable as well as the oriented and soft features of nerve ECM to accelerate axonal regrowth, thus showing great promising potential for applications in neural regeneration. STATEMENT OF SIGNIFICANCE In peripheral nervous system defect repair, a wide variety of strategies have been proposed for preparing functionalized nerve guidance conduits (NGC) with more complex configurations to obtain optimal repair effects. Longitudinally oriented fibrin cables were reported to form spontaneously during the initial stages of peripheral nerve regeneration in an empty NGC, which can direct the migration and proliferation of Schwann cells and promote axonal regrowth. Therefore, based on the biomimetic idea, we prepared a three-dimensional hierarchically aligned fibrin nanofiber hydrogel (AFG) through electrospinning and molecular self-assembly, resembling the architecture and biological function of the native fibrin cable and serving as an intraluminal filling to accelerate axon regeneration. We found that the AFG was a beneficial microenvironment to support SCs cable formation and accelerate axonal regrowth with improved motor functional recovery.
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Zhu S, Ge J, Liu Z, Liu L, Jing D, Ran M, Wang M, Huang L, Yang Y, Huang J, Luo Z. Circadian Rhythm Influences the Promoting Role of Pulsed Electromagnetic Fields on Sciatic Nerve Regeneration in Rats. Front Neurol 2017; 8:101. [PMID: 28360885 PMCID: PMC5350136 DOI: 10.3389/fneur.2017.00101] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 02/28/2017] [Indexed: 12/21/2022] Open
Abstract
Circadian rhythm (CR) plays a critical role in the treatment of several diseases. However, the role of CR in the treatment of peripheral nerve defects has not been studied. It is also known that the pulsed electromagnetic fields (PEMF) can provide a beneficial microenvironment to quicken the process of nerve regeneration and to enhance the quality of reconstruction. In this study, we evaluate the impact of CR on the promoting effect of PEMF on peripheral nerve regeneration in rats. We used the self-made “collagen-chitosan” nerve conduits to bridge the 15-mm nerve gaps in Sprague-Dawley rats. Our results show that PEMF stimulation at daytime (DPEMF) has most effective outcome on nerve regeneration and rats with DPEMF treatment achieve quickly functional recovery after 12 weeks. These findings indicate that CR is an important factor that determines the promoting effect of PEMF on peripheral nerve regeneration. PEMF exposure in the daytime enhances the functional recovery of rats. Our study provides a helpful guideline for the effective use of PEMF mediations experimentally and clinically.
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Affiliation(s)
- Shu Zhu
- Institute of Orthopaedics, Xijing Hospital, The Fourth Military Medical University , Xi'an , China
| | - Jun Ge
- Department of Orthopaedics, 323rd Hospital of PLA, Xi'an, China; Department of Anatomy, The Fourth Military Medical University, Xi'an, China
| | - Zhongyang Liu
- Institute of Orthopaedics, Xijing Hospital, The Fourth Military Medical University , Xi'an , China
| | - Liang Liu
- Department of Orthopaedics, 161st Hospital of PLA , Wuhan , China
| | - Da Jing
- Faculty of Biomedical Engineering, Fourth Military Medical University , Xi'an , China
| | - Mingzi Ran
- Department of Anesthesiology, Xijing Hospital, The Fourth Military Medical University , Xi'an , China
| | - Meng Wang
- General Political Department Hospital of PLA , Beijing , China
| | - Liangliang Huang
- Institute of Orthopaedics, Xijing Hospital, The Fourth Military Medical University , Xi'an , China
| | - Yafeng Yang
- Institute of Orthopaedics, Xijing Hospital, The Fourth Military Medical University , Xi'an , China
| | - Jinghui Huang
- Institute of Orthopaedics, Xijing Hospital, The Fourth Military Medical University , Xi'an , China
| | - Zhuojing Luo
- Institute of Orthopaedics, Xijing Hospital, The Fourth Military Medical University , Xi'an , China
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Zhu L, Wang K, Ma T, Huang L, Xia B, Zhu S, Yang Y, Liu Z, Quan X, Luo K, Kong D, Huang J, Luo Z. Noncovalent Bonding of RGD and YIGSR to an Electrospun Poly(ε-Caprolactone) Conduit through Peptide Self-Assembly to Synergistically Promote Sciatic Nerve Regeneration in Rats. Adv Healthc Mater 2017; 6. [PMID: 28140528 DOI: 10.1002/adhm.201600860] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 11/19/2016] [Indexed: 12/18/2022]
Abstract
The nerve conduit with biofunctionalities can regulate neurite outgrowth, as well as the migration, proliferation, and myelination activity of Schwann cells. In the present study, polycaprolactone (PCL) conduits are coated with Naphthalene-phenylalanine-phenylalanine-glycine-arginine-glycine-aspartic (Nap-FFGRGD) and Naphthalene-phenylalanine-phenylalanine-glycine-cysteine-aspartic-proline-glycine-tyrosine-isoleucine-glycine-serine-arginine (Nap-FFGCDPGYIGSR) by self-assembly. In vitro studies demonstrate that arginine-glycine-aspartic (RGD) and tyrosine-isoleucine-glycine-serine-arginine (YIGSR) are capable of synergistically enhancing the ability of PCL to support the adhesion and proliferation of Schwann cells, as well as increasing neurite outgrowth from dorsal root ganglions explants. This synergistic effect may occur via the activation of both the phosphoinositide 3-kinase/protein kinase B and mitogen-activated protein kinase/extracellular signal-regulated protein kinase pathways. RGD/YIGSR modifications demonstrate beneficial effects across a 15 mm sciatic nerve gap in axonal regeneration and functional recovery. In addition, increased vascularization is observed in the RGD/YIGSR-PCL group, which might contribute to their beneficial effects on nerve regeneration. These findings indicate the potential of the RGD/YIGSR-PCL conduit to promote axonal regeneration and functional recovery, making the RGD/YIGSR-PCL conduit an attractive candidate for the treatment of a critical nerve defect.
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Affiliation(s)
- Lei Zhu
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Kai Wang
- State Key Laboratory of Medicinal Chemical Biology; Key Laboratory of Bioactive Materials; Ministry of Education; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); College of Life Science; Nankai University; Tianjin 300071 China
| | - Teng Ma
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Liangliang Huang
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Bing Xia
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Shu Zhu
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Yafeng Yang
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Zhongyang Liu
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Xin Quan
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Kai Luo
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Deling Kong
- State Key Laboratory of Medicinal Chemical Biology; Key Laboratory of Bioactive Materials; Ministry of Education; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); College of Life Science; Nankai University; Tianjin 300071 China
| | - Jinghui Huang
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Zhuojing Luo
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
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45
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Wu T, Li D, Wang Y, Sun B, Li D, Morsi Y, El-Hamshary H, Al-Deyab SS, Mo X. Laminin-coated nerve guidance conduits based on poly(l-lactide-co-glycolide) fibers and yarns for promoting Schwann cells’ proliferation and migration. J Mater Chem B 2017; 5:3186-3194. [DOI: 10.1039/c6tb03330j] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A laminin-coated and yarn-encapsulated PLGA nerve guidance conduit for Schwann cells’ proliferation and migration.
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Affiliation(s)
- Tong Wu
- State Key Lab for Modification of Chemical Fibers and Polymer Materials
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
- Shanghai 201620
| | - Dandan Li
- College of Material Science and Engineering
- Donghua University
- Shanghai 201620
- China
| | - Yuanfei Wang
- State Key Laboratory of Bioreactor Engineering
- School of Resources and Environmental Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Binbin Sun
- State Key Lab for Modification of Chemical Fibers and Polymer Materials
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
- Shanghai 201620
| | - Dawei Li
- College of Textiles
- Donghua University
- Shanghai 201620
- China
| | - Yosry Morsi
- Faculty of Engineering and Industrial Sciences
- Swinburne University of Technology
- Hawthorn
- Australia
| | - Hany El-Hamshary
- Department of Chemistry
- College of Science
- King Saud University
- Riyadh 11451
- Kingdom of Saudi Arabia
| | - Salem S. Al-Deyab
- Department of Chemistry
- College of Science
- King Saud University
- Riyadh 11451
- Kingdom of Saudi Arabia
| | - Xiumei Mo
- State Key Lab for Modification of Chemical Fibers and Polymer Materials
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
- Shanghai 201620
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46
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Li R, Wu J, Lin Z, Nangle MR, Li Y, Cai P, Liu D, Ye L, Xiao Z, He C, Ye J, Zhang H, Zhao Y, Wang J, Li X, He Y, Ye Q, Xiao J. Single injection of a novel nerve growth factor coacervate improves structural and functional regeneration after sciatic nerve injury in adult rats. Exp Neurol 2016; 288:1-10. [PMID: 27983992 DOI: 10.1016/j.expneurol.2016.10.015] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 09/20/2016] [Accepted: 10/27/2016] [Indexed: 01/19/2023]
Abstract
The prototypical neurotrophin, nerve growth factor (NGF), plays an important role in the development and maintenance of many neurons in both the central and peripheral nervous systems, and can promote functional recovery after peripheral nerve injury in adulthood. However, repair of peripheral nerve defects is hampered by the short half-life of NGF in vivo, and treatment with either NGF alone or NGF contained in synthetic nerve conduits is inferior to the use of nerve autografts, the current gold standard. We tested the reparative ability of a single local injection of a polyvalent coacervate containing polycation-poly(ethylene argininylaspartate diglyceride; PEAD), heparin, and NGF, in adult rats following sciatic nerve crush injury, using molecular, histological and behavioral approaches. In vitro assays demonstrated that NGF was loaded into the coacervate at nearly 100% efficiency, and was protected from proteolytic degradation. In vivo, the coacervate enhanced NGF bioavailability, leading to a notable improvement in motor function (track walking analysis) after 30days. The NGF coacervate treatment was also associated with better weight gain and reduction in atrophy of the gastrocnemius muscle. Furthermore, light and electron microscopy showed that the number of myelinated axons and axon-to-fiber ratio (G-ratio) were significantly higher in NGF coacervate-treated rats compared with control groups. Expression of markers of neural tissue regeneration (MAP-2, S-100β, MBP and GAP-43), as well as proliferating Schwann cells and myelin-axon relationships (GFAP and NF200), were also increased. These observations suggest that even a single administration of NGF coacervate could have therapeutic value for peripheral nerve regeneration and functional recovery.
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Affiliation(s)
- Rui Li
- WZMU-JCU Joint Research Group for Stem Cell and Tissue Engineering, Institute of Stem Cell and Tissue Engineering, Wenzhou Medical University, Wenzhou 325035, China; Growth Factors and Clinical Application Group, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
| | - Jiang Wu
- WZMU-JCU Joint Research Group for Stem Cell and Tissue Engineering, Institute of Stem Cell and Tissue Engineering, Wenzhou Medical University, Wenzhou 325035, China; Growth Factors and Clinical Application Group, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
| | - Zhenkun Lin
- WZMU-JCU Joint Research Group for Stem Cell and Tissue Engineering, Institute of Stem Cell and Tissue Engineering, Wenzhou Medical University, Wenzhou 325035, China.
| | - Matthew R Nangle
- WZMU-JCU Joint Research Group for Stem Cell and Tissue Engineering, Institute of Stem Cell and Tissue Engineering, Wenzhou Medical University, Wenzhou 325035, China; Regenerative Dentistry & Oral Biology Lab, Oral Health Centre, University of Queensland, Brisbane 4006, Australia.
| | - Yi Li
- Growth Factors and Clinical Application Group, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
| | - Pingtao Cai
- Growth Factors and Clinical Application Group, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
| | - Dan Liu
- Growth Factors and Clinical Application Group, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
| | - Libin Ye
- Growth Factors and Clinical Application Group, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
| | - Zecong Xiao
- Growth Factors and Clinical Application Group, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
| | - Chaochao He
- Growth Factors and Clinical Application Group, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
| | - Jingjing Ye
- Growth Factors and Clinical Application Group, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
| | - Hongyu Zhang
- Growth Factors and Clinical Application Group, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
| | - Yingzheng Zhao
- Growth Factors and Clinical Application Group, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
| | - Jian Wang
- Department of Peripheral Neurosurgery, the First Affiliated Hospital Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
| | - Xiaokun Li
- Growth Factors and Clinical Application Group, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
| | - Yan He
- WZMU-JCU Joint Research Group for Stem Cell and Tissue Engineering, Institute of Stem Cell and Tissue Engineering, Wenzhou Medical University, Wenzhou 325035, China; Regenerative Dentistry & Oral Biology Lab, Oral Health Centre, University of Queensland, Brisbane 4006, Australia.
| | - Qingsong Ye
- WZMU-JCU Joint Research Group for Stem Cell and Tissue Engineering, Institute of Stem Cell and Tissue Engineering, Wenzhou Medical University, Wenzhou 325035, China; Regenerative Dentistry & Oral Biology Lab, Oral Health Centre, University of Queensland, Brisbane 4006, Australia.
| | - Jian Xiao
- WZMU-JCU Joint Research Group for Stem Cell and Tissue Engineering, Institute of Stem Cell and Tissue Engineering, Wenzhou Medical University, Wenzhou 325035, China; Growth Factors and Clinical Application Group, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
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47
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Monaco G, Cholas R, Salvatore L, Madaghiele M, Sannino A. Sterilization of collagen scaffolds designed for peripheral nerve regeneration: Effect on microstructure, degradation and cellular colonization. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 71:335-344. [PMID: 27987715 DOI: 10.1016/j.msec.2016.10.030] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 09/21/2016] [Accepted: 10/16/2016] [Indexed: 02/01/2023]
Abstract
In this study we investigated the impact of three different sterilization methods, dry heat (DHS), ethylene oxide (EtO) and electron beam radiation (β), on the properties of cylindrical collagen scaffolds with longitudinally oriented pore channels, specifically designed for peripheral nerve regeneration. Scanning electron microscopy, mechanical testing, quantification of primary amines, differential scanning calorimetry and enzymatic degradation were performed to analyze possible structural and chemical changes induced by the sterilization. Moreover, in vitro proliferation and infiltration of the rat Schwann cell line RSC96 within the scaffolds was evaluated, up to 10days of culture. No major differences in morphology and compressive stiffness were observed among scaffolds sterilized by the different methods, as all samples showed approximately the same structure and stiffness as the unsterilized control. Proliferation, infiltration, distribution and morphology of RSC96 cells within the scaffolds were also comparable throughout the duration of the cell culture study, regardless of the sterilization treatment. However, we found a slight increase of chemical crosslinking upon sterilization (EtO<DHS<β), together with an enhanced resistance to denaturation of the EtO treated scaffolds and a significantly accelerated enzymatic degradation of the β sterilized scaffolds. The results demonstrated that β irradiation impaired the scaffold properties to a greater extent, whereas EtO exposure appeared as the most suitable method for the sterilization of the proposed scaffolds.
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Affiliation(s)
- Graziana Monaco
- Department of Engineering for Innovation, University of Salento, Via per Monteroni, 73100 Lecce, Italy; Dhitech Scarl - Distretto Tecnologico High Tech, Via per Monteroni, 73100 Lecce, Italy
| | - Rahmatullah Cholas
- Department of Engineering for Innovation, University of Salento, Via per Monteroni, 73100 Lecce, Italy
| | - Luca Salvatore
- Department of Engineering for Innovation, University of Salento, Via per Monteroni, 73100 Lecce, Italy
| | - Marta Madaghiele
- Department of Engineering for Innovation, University of Salento, Via per Monteroni, 73100 Lecce, Italy.
| | - Alessandro Sannino
- Department of Engineering for Innovation, University of Salento, Via per Monteroni, 73100 Lecce, Italy
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48
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Wlaszczuk A, Marcol W, Kucharska M, Wawro D, Palen P, Lewin-Kowalik J. Poly(D,L-Lactide-Co-Glycolide) Tubes With Multifilament Chitosan Yarn or Chitosan Sponge Core in Nerve Regeneration. J Oral Maxillofac Surg 2016; 74:2327.e1-2327.e12. [PMID: 27542542 DOI: 10.1016/j.joms.2016.07.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 07/07/2016] [Accepted: 07/07/2016] [Indexed: 10/21/2022]
Abstract
PURPOSE The influence of different kinds of nerve guidance conduits on regeneration of totally transected rat sciatic nerves through a 7-mm gap was examined. MATERIALS AND METHODS Five different types of conduits made of chitosan and poly(D,L-lactide-co-glycolide) (PLGA) were constructed and tested in vivo. We divided 50 animals into equal groups of 10, with a different type of conduit implanted in each group: chitosan sponge core with an average molecular mass of polymer (Mv) of 287 kDa with 7 channels in a PLGA sleeve, chitosan sponge core with an Mv of 423 kDa with 7 channels in a PLGA sleeve, chitosan sponge core (Mv, 423 kDa) with 13 channels in a PLGA sleeve, chitosan multifilament yarn in a PLGA sleeve, and a PLGA sleeve only. Seven weeks after the operation, we examined the distance covered by regenerating nerve fibers, growing of nerves into the conduit's core, and intensity and type of inflammatory reaction in the conduit, as well as autotomy behavior (reflecting neuropathic pain intensity) in the animals. RESULTS Two types of conduits were allowing nerve outgrowth through the gap with minor autotomy and minor inflammatory reactions. These were the conduits with chitosan multifilament yarn in a PLGA sleeve and the conduits with 13-channel microcrystalline chitosan sponge in a PLGA sleeve. CONCLUSIONS The type of chitosan used to build the nerve guidance conduit influences the intensity and character of inflammatory reaction present during nerve regeneration, which in turn affects the distance crossed by regenerating nerve fibers, growing of the nerve fibers into the conduit's core, and the intensity of autotomy in the animals.
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Affiliation(s)
- Adam Wlaszczuk
- Assistant Professor, Department of Physiology, Medical University of Silesia, Katowice, Poland
| | - Wiesław Marcol
- Assistant Professor, Department of Physiology, Medical University of Silesia, Katowice, Poland.
| | - Magdalena Kucharska
- Assistant Professor, Biomaterials, Institute of Biopolymers and Chemical Fibres, Lodz, Poland
| | - Dariusz Wawro
- Assistant Professor, Fibres from Natural Polymers, Institute of Biopolymers and Chemical Fibres, Lodz, Poland
| | - Piotr Palen
- Assistant Professor, Department of Pathomorphology, Medical University of Silesia, Katowice, Poland
| | - Joanna Lewin-Kowalik
- Full Professor, Department Head, Department of Physiology, Medical University of Silesia, Katowice, Poland
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49
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Bhutto MA, Zhang J, Sun B, El-Hamshary H, Al-Deyab SS, Mo X. Development of poly (L-lactide-co-caprolactone) multichannel nerve conduit with aligned electrospun nanofibers for Schwann cell proliferation. INT J POLYM MATER PO 2016. [DOI: 10.1080/00914037.2015.1099104] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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50
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Ma J, Yu H, Liu J, Chen Y, Wang Q, Xiang L. Curcumin promotes nerve regeneration and functional recovery after sciatic nerve crush injury in diabetic rats. Neurosci Lett 2015; 610:139-43. [PMID: 26552010 DOI: 10.1016/j.neulet.2015.11.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 11/02/2015] [Accepted: 11/03/2015] [Indexed: 12/20/2022]
Abstract
Curcumin is capable of promoting peripheral nerve regeneration in normal condition. However, it is unclear whether its beneficial effect on nerve regeneration still exists under diabetic mellitus. The present study was designed to investigate such a possibility. Diabetes in rats was developed by a single dose of streptozotocin at 50 mg/kg. Immediately after nerve crush injury, the diabetic rats were intraperitoneally administrated daily for 4 weeks with curcumin (50 mg/kg, 100 mg/kg and 300 mg/kg), or normal saline, respectively. The axonal regeneration was investigated by morphometric analysis and retrograde labeling. The functional recovery was evaluated by electrophysiological studies and behavioral analysis. Axonal regeneration and functional recovery was significantly enhanced by curcumin, which were significantly better than those in vehicle saline group. In addition, high doses of curcumin (100 mg/kg and 300 mg/kg) achieved better axonal regeneration and functional recovery than low dose (50 mg/kg). In conclusion, curcumin is capable of promoting nerve regeneration after sciatic nerve crush injury in diabetes mellitus, highlighting its therapeutic values as a neuroprotective agent for peripheral nerve injury repair in diabetes mellitus.
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Affiliation(s)
- Junxiong Ma
- Department of Orthopedics, General Hospital of Shenyang Military Area Command of Chinese PLA, Rescue Center of Severe Wound Chinese Trauma of PLA, Shenyang 110016, Liaoning, China
| | - Hailong Yu
- Department of Orthopedics, General Hospital of Shenyang Military Area Command of Chinese PLA, Rescue Center of Severe Wound Chinese Trauma of PLA, Shenyang 110016, Liaoning, China
| | - Jun Liu
- Department of Orthopedics, General Hospital of Shenyang Military Area Command of Chinese PLA, Rescue Center of Severe Wound Chinese Trauma of PLA, Shenyang 110016, Liaoning, China
| | - Yu Chen
- Department of Orthopedics, General Hospital of Shenyang Military Area Command of Chinese PLA, Rescue Center of Severe Wound Chinese Trauma of PLA, Shenyang 110016, Liaoning, China
| | - Qi Wang
- Department of Orthopedics, General Hospital of Shenyang Military Area Command of Chinese PLA, Rescue Center of Severe Wound Chinese Trauma of PLA, Shenyang 110016, Liaoning, China
| | - Liangbi Xiang
- Department of Orthopedics, General Hospital of Shenyang Military Area Command of Chinese PLA, Rescue Center of Severe Wound Chinese Trauma of PLA, Shenyang 110016, Liaoning, China.
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